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Theresa Jimmie KNORR






Born: Theresa Jimmie Cross
Classification: Murderer
Characteristics: Parricide - Torture
Number of victims: 2 +
Date of murders: July 16, 1984 / June 21, 1985
Date of arrest: November 10, 1993
Date of birth: March 12, 1946
Victims profile: Suesan Marlene Knorr, 17 (her daughter) / Sheila Gail Sanders, 20 (her daughter)
Method of murder: Dousing with gasoline and setting afire / Dehydration and starvation
Location: Placer County/Sacramento County, California, USA
Status: Plead guilty on October 17, 1995. Sentenced to two consecutive life terms
photo gallery

Department of Psychology
Radford University


Theresa Knorr née Cross (born March 12, 1946) is a mother and murderer, known for severely abusing and murdering two of her children while using the others to facilitate and cover up her crimes.

Theresa Cross was born in Sacramento, California to Jim Cross and Swannie Gay. She was the youngest child in the family and very devoted to her mother. When her mother died in 1961, she went into a depression. At the age of 16 she married Clifford Clyde Sanders. They had a son Howard together, but fought from time to time. This ended when she shot him dead in 1964 while they were living in Galt, California. She was tried and found not guilty. She was pregnant at the time and would shortly deliver her second child Sheila in 1965.

In 1966 she married Robert Knorr, seven months pregnant with their child. Her third child was Suesan born in September, 1966. And her fourth, born a year later was William. Her fifth born in 1968 was Robert.

She focused her anger primarily at her daughters and trained her sons to beat and discipline the others. She murdered her oldest daughter Suesan by burning her alive. She then murdered her second daughter, Sheila, through starvation.

Knorr and her sons were arrested in 1993. She first pled not guilty. However, when she learned that one of her sons decided to testify against her, she pled guilty to all charges to avoid capital punishment. She was sentenced to two consecutive life terms. She will be eligible for parole in 2027.


Theresa Jimmie Knorr (born March 14, 1946) is an American woman convicted of torturing and murdering two of her children while using the others to facilitate and cover up her crimes.

Early life

Theresa Knorr was born Theresa Jimmie Cross in Sacramento, California. She was the youngest child in the family and very devoted to her mother. When her mother died in 1961, Cross went into a depression. At age 16, she married Clifford Clyde Sanders. They had a son, Howard Clyde Sanders, in 1964. Their marriage ended when Knorr shot Sanders, 22, to death in the summer of 1964 while they were living in Galt, California. She was tried, but acquitted of the crime, having claimed self defense. She was pregnant at the time and would shortly deliver her second child, Sheila Gay Sanders, in 1965.

In 1966, when seven months pregnant with her third child, she married the child's father, Robert Knorr. The child, Suesan Marlene Knorr, was born in September of that year, followed in 1967 by a son named William Robert Knorr, and in 1968, another son, Robert Wallace Knorr, Jr. In 1970, Theresa gave birth to a daughter, Theresa (Terry) Marie Knorr, named after herself.

None of Knorr's children were spared her physical, verbal, and psychological abuse. However, Knorr had a special hatred for her daughters Suesan and Sheila, fueled by jealousy that the girls were growing up and blossoming into young women while she faced the prospect of growing old and losing her looks, according to an interview with her surviving daughter, Terry, in an episode of A&E's Cold Case Files (titled "Mommy's Rules"). For years, Knorr abused and tortured her children in various ways, including burning them with cigarettes and beating them. Knorr focused her anger primarily on her daughters and trained her sons to beat, discipline, and restrain their sisters.

Suesan's death

In a heated argument in 1983, Knorr grabbed a 22-caliber pistol and shot Suesan in the chest. The bullet became lodged in her back, but Knorr refused to seek medical help and left Suesan to die in the family bathtub. Suesan survived, so Knorr handcuffed her to a soap dish and began to nurse her back to health. Suesan eventually recovered from her wounds without professional treatment.

In 1984, Suesan decided to tell her mother she would like to move out. Knorr agreed under the condition that Suesan let her remove the bullet from her back. The removal took place on the kitchen floor, using Mellaril capsules and liquor as the anesthetic. Knorr ordered Robert to remove the bullet with a box cutter. Infection soon set in and Suesan's skin turned yellow from jaundice and she became delirious. She lay dying on the floor and Knorr permitted the other children to walk over her. As Terry told Cold Case Files, Knorr told her other children that Suesan's illness was a result of possession by Satan and that the only way to purge the demon was with fire. She coerced Robert and Bill into helping her dispose of Suesan. They drove her to Sierra Nevada, Interstate 80 outside Truckee, laid her down, poured gasoline on her and burned her alive

Sheila's death

In 1985, Sheila also died at the hands of her mother. According to Terry, Knorr forced Sheila into becoming a prostitute and later accused her of transmitting an STD to her via a toilet seat. Thereafter, Knorr's abuse of Sheila escalated. Sheila was locked in a closet and died of dehydration and starvation several days later. Her body was packed into a cardboard box and dumped along the side of a road. She remained unidentified for years afterward.

Terry's attack

Subsequently, Terry claimed her mother forced her to burn down the family's Sacramento apartment, hoping to destroy any evidence that might implicate her in Sheila's death. Terry later said she survived her mother's abuse because she stood up to her and demanded to be allowed to leave the house.


Knorr and her sons were arrested in 1993 when Terry contacted authorities after watching an episode of America's Most Wanted, according to her Cold Case Files interview. On November 15, 1993, Knorr was charged with two counts of murder, two counts of conspiracy to commit murder, and two special circumstances charges: multiple murder and murder by torture. Knorr initially pled not guilty, but when she learned that one of her sons decided to testify against her, she pled guilty to all charges to avoid capital punishment. On October 17, 1995, she was sentenced to two consecutive life sentences. She will be eligible for parole in 2027.

Popular culture

The Afflicted, renamed Another American Crime for overseas release, is a 2010 horror film produced by Midnight Releasing in association with Afflicted Pictures and written and directed by Jason Stoddard. Stars Leslie Easterbrook, Kane Hodder, Michele Grey, Katie Holland and J. D. Hart. Inspired by the Theresa Knorr case, the movie roughly follows the real life events through a substantially compressed timeline. Unlike the real case, the movie ends with the youngest daughter killing her mother and one of her brothers before committing suicide.


Theresa Cross aka Jimmie Knorr

A mother of three sons and three daughters, she wounded one daughter with a gun, and when the daughter wasn't dead after a few weeks, she tried to remove the bullet. The attempted surgery left the daughter near death. This kind mother put the other daugher in a closet and told the other children not to feed her. Eventually, the kid died and her remains were just dumped.

Another daughter was beaten to death, and the two corpses were taken up to the mountains and, with the help of her teenage sons, burned with a pile of trash. During her trial it came out that she was acquitted in the murder of her former husband years before. The last and youngest daughter was the one to finally get the authorities to investigate and believe what she was telling them, on her second attempt.


Theresa Jimmie Cross

Suesan Knorr 17 years old Died from medical neglect

The young woman's tale was unbelievably gruesome and bizarre -- so much so, in fact, that she says police twice brushed her off. She had to be making it up.

She says she told police in Utah six years ago that in 1984, her mother and two brothers killed her sister by dousing her with gasoline and setting her afire. The next year, she told them, they killed her other sister, starving her to death in a closet and dumping her body in the mountains.

Horrible if true, but apparently no one thought it was -- until last month. Detectives in Northern California's Placer County matched her story to two bodies whose identities had been a mystery for years.

Now her mother and two brothers are charged with murder, and investigators are delving into a family that stretches the definition of the word, a household bound not by love but by fear and violence.

It was, said Sheriff Donald Nunes, "one of the most bizarre and unbelievably sad family situations anyone could ever imagine."

Theresa Jimmie Cross, 47, ruled her children by bullying and beating them into submission -- and when that didn't work, by killing them, authorities said. "I knew they were weird, but I didn't know they were that weird," said Susan Sullivan, a former neighbor.

From the start, this was no ordinary family.

Cross married young. In 1964, when she was 18 and pregnant with her second child, she shot and killed her first husband, Clifford Sanders. She claimed self-defense, saying she shot him to stop him from hitting her, and a jury acquitted her.

She was left with two children: Howard, born in 1963, and Sheila, born in 1965. She remarried, and with Robert Knorr bore four children in as many years: Suesan, William, Robert and, finally, Theresa, the girl who last month turned her relatives in.

Cross' second marriage was no better than the first. Knorr left in 1970, and his wife reverted to her given name of Cross, even though she married again at least twice. "They weren't what you'd call long-term relationships," sheriff's Inspector Johnnie Smith said.

Cross and the children lived for 13 years in Orangevale, a Sacramento suburb, then moved in 1983 to a run-down neighborhood on Sacramento's Auburn Boulevard. Even in the rough neighborhood, Cross and her children stood out.

Former neighbors say the family's two-bedroom apartment was dirty and smelled of urine. The children seemed nervous, and Cross was secretive, never using the front door, they said.

Most of the children never made it past the eighth grade, said sheriff's Lt. Chal DeCecco. When they were home, Cross seldom let them out of her sight. A childhood friend of Suesan's told investigators the girl would get hysterical if her school bus ran late, knowing she'd be beaten for her tardiness when she got home.

Such were the outward signs of abuse. The family's darkest secrets remained hidden until last month, when detectives got a call from Theresa, now 22 and living in Utah.

According to Smith, this is what she told them:

Suesan was the first to die. During an argument, perhaps as early as 1982, Cross grabbed a handgun and shot Suesan in the chest, Theresa said. The bullet lodged in her back, but she recovered without medical help.

In 1984, at age 17, Suesan said she wanted to leave home. Cross agreed under one condition: Suesan must let her remove the bullet from her back, Theresa said. That way, if she ever were to report abuse, there would be no evidence. The kitchen floor was the operating table, whiskey the anesthetic. Cross dug the bullet out of her daughter's back with a scalpel, Theresa said. An infection set in, and Suesan grew delirious. Cross decided they had to get rid of her, so she enlisted the aid of William and Robert to dispose of their sister, Theresa said.

They drove Suesan 100 miles into the Sierra Nevada, turning off the highway near the Squaw Valley ski area. There, they laid her down, doused her with gasoline and burned her alive, Theresa said.

Sheila was next. During an argument with her mother in 1985, Sheila was beaten, handcuffed and forced into a narrow closet, Theresa said.

Theresa, 13 at the time, recalls hearing her 20-year-old half sister moaning and crying, "Help me, help me." But nobody opened the door, she said. After a few days, the cries stopped, and after a week or so, the stench of rotting flesh filled the apartment.

Cross enlisted her sons for another trip to the mountains, where they left Sheila's body by the road in a cardboard box, Theresa said.

The odor of death hung in the apartment, she said, and the family soon moved out. Theresa said her mother then ordered her to set fire to the apartment; firefighters doused the blaze before it spread to the building's other apartments.

The family deteriorated further. Detectives believe Howard, the oldest son, never lived at the Auburn Boulevard apartment. Theresa said she stayed with her mother for three years before running away at 16. Robert told detectives he last saw his mother six years ago.

Inspector Smith said Theresa's story is supported by statements from her brothers and by physical evidence found with the bodies. There are no plans to charge her, he said. She's married now, and officials aren't releasing their key informant's new last name.

Theresa said she tried to tell her story starting in 1987, contacting an attorney and two police departments in Utah. Smith wouldn't say which agencies they were.

"The only thing we can surmise is that the people she reported it to thought her story was so bizarre it couldn't be truthful," Smith said. Watching a true crime show on television spurred Theresa to try again. She called Placer County officials after consulting a map to see who had jurisdiction over the area where the bodies had been dumped.

Theresa's story revived the county's dead end investigation of the two slain females, and tracking down the suspects was easy.

William, 26, was found in a Sacramento suburb where he worked in a warehouse and lived with his wife in a peaceful, tidy neighborhood.

Robert, 24, is in a Nevada prison, serving a 15-year sentence for second-degree murder stemming from a 1992 robbery.

Cross was arrested Nov. 10 in Salt Lake City, where she worked as a home health aide for an 86-year-old woman and, according to the woman's son, "did an absolute super job."

Placer County authorities plan to pursue extradition, but Cross told detectives that she would fight the efforts.

a 2 z of serial killers


Theresa Knorr

Theresa was charged in the torture slayings of her two daughters and arraigned in a Salt Lake City courtroom on November 15, 1993

According to articles in the Sacramento Bee, she was extradited to Placer County the following month, arraigned before Superior Court Judge J. Richard Couzens and charged with two counts of murder, two counts of conspiracy to commit murder, and two special circumstances—multiple murder and murder by torture—charges, which could result in a death sentence. 

Theresa pleaded not guilty and was remanded to the Sacramento County Jail.  That same day, Judge Couzens ordered William Robert Knorr prosecuted as an adult.  Robert eventually struck a deal with prosecutors and agreed to testify against Theresa in exchange for a lighter sentence.  One month later, all charges against him, except a single count of conspiracy regarding Sheila's death, were dropped.

When Theresa learned of the deal Robert made with the district attorney's office, she decided she did not want to take her chances with a death sentence and offered to plead guilty in exchange for her life.   District Attorney John O'Mara agreed and on October 17, 1995, Theresa changed her plea to guilty.   During sentencing, Judge William R. Ridgeway characterized Theresa's crimes as "callousness beyond belief," and sentenced her to two consecutive life sentences.  Theresa will be eligible for parole in 2027.  If she lives to see it, she will be 80 years old. 

Robert, who was still serving out his murder charge in Nevada, was eventually sentenced to three years in state prison.   The court ordered the sentence run concurrently with his 1991 murder sentence.  William was placed on probation for his role in the murders and ordered to undergo therapy.

On April 9, 2003, The Plain Dealer, a Cleveland, Ohio, newspaper, ran an article entitled: "Searching for answers on mothers who kill."  According to the story, an American mother kills her child at the rate of once every three days.  "These cases are patterned and predictable," said Michelle Oberman, a legal scholar and expert on women who kill their offspring.  "They are not shocking; they are mundane.  We just don't want to know what we know.


Mother Knows Best: The Story of Theresa Jimmie Cross

By David Lohr

Unforeseen Discovery

On the morning of July 17, 1984, 45-year-old Maybel Harrison was driving on California's Highway 89 when she noticed a bright light illuminating the woods. Concerned that a fire had broken out, Maybel decided to investigate. From her vantage point on the interstate, Maybel wasn't sure what she was looking at, but as she made her way down the rocky slope to get a closer look, a permeating stench stopped her. Alarmed, she ran back up the incline and flagged down a truck.

Robert Eden stopped his truck when he saw Maybel waving her arms. When she told him there was an unusual fire burning at the bottom of the hill, Eden grabbed his fire extinguisher and the two headed toward the source. After Eden doused the flames and the smoke began to clear, he and Maybel discovered what appeared to be a charred human corpse. As soon as the reality of the situation hit him, Eden ran back to his truck and reported the grisly discovery to authorities on his CB radio.

Emergency services personnel were already surrounding the area by the time Tahoe City Detectives Russell Potts and Larry Addoms arrived on the scene. After looking over the gruesome sight, Potts requested that criminologist Michael Saggs and Placer County Sheriff Donald J. Nunes be brought in. Within an hour, the four men were taking soil samples and photographing the area. The body was badly burned and the lower portion of the victim's left leg was detached and lying next to the body. The left arm was propped up on its elbow and the right arm was extended at the victim's side. The only part of the body not burned was the left side of the victim's face. It was obvious that the victim was female: her breasts, although severely charred, remained visible.

In all, investigators collected more than 30 pieces of evidence, which they found on and around the body. Among the items cataloged, a green Pepsodent toothbrush, a pair of Gloria Vanderbilt jeans, a yellow and black scarf, an underwire size 32C bra from J.C. Penney's, a black onyx bracelet, disposable diapers, a pair of hoop earrings, and several miscellaneous articles of clothing. After finishing up the crime scene, investigators dubbed the body Jane Doe #4873/84 and sent her to the Placer County Morgue.

Less than two hours later, forensic pathologist Dr. A. V. Cunha conducted the autopsy. The victim was between 18 and 22 years old, 5 feet 3 inches tall and weighing approximately 115 pounds. The body showed signs of abuse, and there were two puncture wounds discovered on the victim's back. The discovery of an ovarian tumor indicated that Jane Doe had suffered a severe beating at some time prior to her death. Her physical injuries were life threatening, but the immediate cause of death was smoke inhalation. Following the autopsy, Jane Doe's fingers were removed and sent to Sacramento for prints. Her maxilla and mandible were also removed in case dental records surfaced. Investigators had few clues to go on and very little hope of discovering the identity of Jane Doe #4873/84.


According to the 1995 book Mother's Day, by Dennis McDougal, Theresa Jimmie Francine Cross was born on March 12, 1946. Her father, Jim Cross, was an assistant cheese maker at Sacramento's Golden State Dairy, and her mother, Swannie Gay Cross, worked at a local lumber company. Theresa had an older sister, Rosemary, born in 1944 and two older stepsiblings, William and Clara Tapp. The stepchildren were from Swannie's first marriage, which unexpectedly ended with the death of her husband in 1939.

The Cross family prospered over the years and by the early 1950s they were able to move out of their small Sacramento bungalow and purchase a large house in Rio Linda, California. Nonetheless, their happiness was short lived, and sometime during the late 1950s, Jim Cross fell ill with Parkinson's disease. He could no longer work and was forced to quit his job. Following his diagnosis, Jim fell into a deep depression and often took his anger out on his children.

According to friends of the family, Theresa was a loner and jealous of her sister Rosemary. If they weren't fighting over a neighborhood boy, they were competing for their mother's attention. Theresa was especially fond of her mother, and outsiders felt that Swannie favored Theresa over Rosemary. In retrospect, the afternoon of March 2, 1961, probably affected Theresa more than anyone could have imagined. Theresa was escorting her mother to a local store that day when her mother suddenly collapsed. As Theresa held the woman in her arms, Swannie breathed her last breath and died. Her cause of death was congestive heart failure and on March 6, 1961, Swannie Cross was buried at Sunset Lawn Cemetery.

Following the death of her mother, Theresa fell into a deep depression, from which she never seemed to fully recover. Without Swannie's income, Jim Cross could no longer afford to keep the family home and was forced to sell it. Bit by bit, every piece of security Theresa had known was taken away from her. With her life in disarray, Theresa latched onto the first man that walked into her life.

Clifford Clyde Sanders was five years older than Theresa when the two first met at a mutual friend's house. Within weeks, the young couple was in love and discussing marriage. Whether Theresa actually loved Clifford or simply wanted security in her life is anyone's guess. Regardless, on September 29, 1962, Theresa Jimmie Cross became Theresa Jimmie Sanders. Shortly after the wedding, Theresa dropped out of junior high school and the couple moved into a one-bedroom apartment in the North Highlands district of California.

It did not take long for the marriage to start going down hill. Theresa was very possessive of Clifford and kept him on a short leash. On July 16, 1963, Theresa gave birth to their first child, Howard Clyde Sanders. Things seemed to settle down for a while, but eventually Theresa reverted back to her old ways. Howard was unhappy in the marriage and had it not been for Theresa's second pregnancy in the spring of 1964, he probably would have left her. Their one bedroom apartment was too small for another child and the growing family moved into a small white house just outside of Sacramento.

Defending Dignity

While Theresa and Clifford's marriage had its ups and downs, tempers came to a boiling point on June 22, 1964. Rather than spend the day with her and the baby, Clifford went out drinking with his friends. Later that evening, he strolled in drunk and Theresa boiled over. She berated him for neglecting his family and wasting their much-needed money on booze. Clifford was in no mood to argue and ended her tirade with a single punch to the face. Theresa went to the police station and filed assault-and-battery charges against him, but when it came time to arrest him, she refused to sign the papers and the charges were dropped.

According to the 1995 book Whatever Mother Says by Wensley Clarkson, Clifford had a huge argument with Theresa on his birthday, July 5, 1964. Theresa accused him of infidelity and he decided he had had enough. The following day, Clifford packed his bags and told Theresa that he was leaving her. Unfortunately, he never made it out the door. Theresa went into a rage, grabbed a rifle and shot her husband. Clifford stumbled backwards and fell dead.

Galt Police Chief Walter Froehlich was one of the first officers on the scene.

"I grabbed a gun to make him keep from hitting me and it went off," Theresa said. Clifford's body was lying facedown in the doorway of the kitchen and on the opposite end of the room Froehlich found the rifle leaning against a wall. Froehlich arrested Theresa and transported her to the Sacramento County Jail. Baby Howard was then taken to stay with one of Theresa's relatives.

The headline on the July 7, 1964, Sacramento Bee daily newspaper announced MURDER CHARGE IS DUE IN GALT DEATH. The first paragraph read: "Deputy District Attorney Donald Dorfman said he planned to file a murder charge today against 18-year-old Mrs. Theresa Sanders of Galt in the deer rifle slaying of her husband. Clifford Sanders, 23, was slain yesterday morning in the couple's small Galt home. Investigators reported the bullet apparently grazed off his left wrist and lodged in his heart."

On August 4, 1964, Theresa entered a plea of innocent by reason of self-defense in a Sacramento courtroom. Her trial was scheduled to begin three weeks later in Judge Charles W. Johnson's courtroom.

Unexpected Outcome

Deputy District Attorney Donald Dorfman wanted a first-degree murder conviction and on August 30, 1964, he began his opening statements to the jury. Dorfman accused Theresa of murdering her husband in cold blood and insisted she had concocted the allegations of self-defense in order to spare herself a prison sentence. The murder, in Dorfman's opinion, was committed because of Theresa's suspicions that her husband was committing adultery. Afterwards, Theresa's attorney, Robert Zarick, argued that Theresa acted out of self-defense and was only protecting herself and her unborn child.

One of the first witnesses called to the stand was Dr. Arthur Wallace, the man who performed Clifford Sanders' autopsy. Wallace testified that there were no powder burns on the body and blood tests revealed no presence of alcohol. He described the injuries to Sanders body and testified that the .30-30 caliber slug had passed through Sanders wrist before embedding itself in his heart. "It was my assumption, and I believe this is very correct, that the deceased apparently had his hand in some position in front of his chest," Wallace said. "The fact that it lodged within the soft tissues of the heart shows that its momentum was considerably slowed when it struck the chest." Following Wallace's testimony, a criminologist testified that the .30-30 caliber rifle found at the scene was the murder weapon.

Police Chief Walter Froehlich described the crime scene and events leading up to Theresa's arrest. Rapping up the prosecution's side, Dorfman questioned several of Sanders' relatives in an effort to show the victim was not a violent or abusive person.

Surprisingly, Theresa briefly took the stand and testified on her own behalf. She told the jury a tearful story of physical abuse and claimed her husband was a violent alcoholic. Mental health counselor Dr. Leroy Wolter described Theresa as anxious, remorseful, and frightened. It was his opinion that she acted in self-defense and was not capable of committing a cold-blooded and calculated crime. Friends and relatives enforced Wolter's testimony and described Theresa as a sweet young girl, who did not know what she was getting into when she married Sanders.

Closing arguments began on September 21, 1964. Dorfman repeated his opening statements and accused Theresa of murdering her husband out of jealousy. "This is clearly premeditated first-degree murder," he told the jury. "Not every murderer can look like the witch in 'Snow White.' She is 18 and pregnant, but that doesn't overcome the fact she maliciously shot and killed her husband without provocation."

On September 22, after deliberating for one hour and 45 minutes, the jury found Theresa Jimmie Francine Sanders not guilty. Dorfman was dumbstruck by the verdict. Whether he realized it at the time or not, the loss would eventually come back to haunt him.

Moving On

After earning her acquittal, Theresa regained custody of her son Howard and moved in with family friends. She was four months pregnant. Her marriage to Clifford may not have been happy, but at least it provided her with a sense of belonging. Now, at just 18, she was alone and again desperately seeking stability. To cope, Theresa turned to alcohol and began drowning her sorrows at a local American Legion Hall. It was there that she met Estelle Lee Thornsberry, an Army veteran who had suffered a debilitating blow two years earlier when a swimming accident left him a quadriplegic. Nonetheless, Thornsberry's disability didn't seem to bother Theresa and the two began dating.

On March 13, 1965, Theresa gave birth to Sheila Gay Sanders. Even though the child was not his, Thornsberry doted on her and treated her as his own. Deeply in love with Theresa, he suggested they all move in together and live as a family. Theresa agreed and a few weeks later they rented out a small apartment. In the beginning, Thornsberry enjoyed the living arraignments, but his feelings began to change when Theresa started treating him as a babysitter, rather than a love interest. With the relationship already rocky, things came to an end a few months later when Thornsberry discovered Theresa was cheating on him with his best friend. Following a heated argument, Theresa packed her belongings, along with most of Thornsberry's, and moved in with friends.

Shortly after her break up with Estelle Thornsberry, Theresa set her sights on Robert Knorr, a private in the Marine Corps. The two began dating and within a few months Theresa was pregnant and they began discussing marriage. In February 1966, Knorr was shipped off to Vietnam. Shortly after his arrival, Knorr was on patrol when a stray bullet struck him in the shoulder. The injury was not serious, but frightening just the same. After a brief stay in a field hospital, he was back on his feet and patrolling the jungle again. But, just weeks later, Knorr was again shot. This time the bullet hit him in the side, but barely penetrated the skin, earning him another brief stay in the hospital. His luck was running out though. A few months later, while walking across a bridge in the middle of nowhere, it suddenly blew up. Shrapnel from the explosion ripped through his arms and legs and the explosion threw him back to the ground. Luckily for Knorr, there would be no more close calls. His latest injuries earned him a trip stateside and he spent several months recovering at Oakland Naval Hospital.

By June 1966, Theresa was seven months pregnant and eager to settle down with Knorr. On July 9, 1966, the young couple drove to Nevada and exchanged vows in front of a local judge. It was Robert's first marriage and Theresa's second. Both were eager to settle into their new roles and rented a small apartment in Sacramento. Two months later, on September 27, 1966, Theresa gave birth to her third child, a girl. Theresa named the child Suesan Marline Knorr. Less than three months later, Theresa was pregnant again and on September 15, 1967, she bore Robert his first son, William Robert Knorr. A second son, Theresa's fifth child, was born on December 31, 1968. Keeping her older half-brother in mind, Theresa named the boy Robert Wallace Knorr.


Robert continued to serve in the military, but his diminished abilities left him few options and he was forced to work as a burial escort. The job wasn't without its perks, but it often required Robert to leave his family on a moment's notice and travel halfway around the country. Theresa disliked Robert's new job and regularly voiced her opposition. Just as she did with Clifford, she began accusing him of infidelity. Tempers often flared and Theresa took her anger out on the children. According to Dennis McDougal, author of the book Mother's Day, Theresa would often punish them by forcing them to sit on the floor without moving. If they budged an inch or moved and eye, she would become angry and slap them. Whenever that didn't work, she would lock them in a closet or force-feed them until they were ready to collapse.

By June 1969, Robert could no longer take Theresa's allegations and sudden outbursts. Leaving his children behind, he packed up what few belongings he had and moved out. Theresa retaliated by filing for divorce on grounds of extreme cruelty, but a few weeks later they reconciled and she dismissed her charges. Regardless, as much as Robert wanted to make the marriage work, it was far too late. One year later Theresa again filed for divorce. In an ironic twist, Judge Charles W. Johnson, the same judge that presided over Theresa's murder trial, granted the couple a divorce on June 3, 1970. Two months later, Theresa gave birth to her sixth and final child and named the girl after herself, Theresa Marie Knorr. Following the divorce, Robert tried to visit his children, but Theresa did not want anything to do with him and repeatedly denied him the right to see them. Robert eventually gave up and remarried.

Theresa didn't stay single for long and soon began dating a railway worker named Ronald Pulliam. In 1971 they married and shortly after purchased a house in east Sacramento. To outsiders they seemed like a perfect family, but before long history began to repeat itself and Theresa began treating Ronald as a possession rather than a partner. Just as she did with Estelle Thornsberry, Theresa began leaving her children at home with Ronald while she went out and partied. Eventually, she stopped coming home all together. Ronald was convinced that she was seeing another man and filed for divorce. On September 27, 1972, with Judge Charles W. Johnson again presiding, the divorce was granted.

With her newfound freedom, Theresa spent the majority of her time drinking at the American Legion Hall in Rio Linda. It was there that she met 59-year-old Chet Harris, a copy desk editor at the Sacramento Union newspaper. The two seemed to hit it off well and were married on August 23, 1976, just three days after their first meeting. It was immediately obvious to Theresa that she had made yet another bad mistake. Shortly after moving in with her new husband, she discovered that one of his favorite hobbies was taking photographs of nude women. In fact, his bedroom walls were covered with them. He wanted Theresa to pose for him, but she refused. While Theresa may have hated her new husband, her daughter Suesan grew close to him and the two would often spend hours together working on jigsaw puzzles and discussing mythology. The relationship between her daughter and Harris angered Theresa. While she wasn't particularly close to any of her children, she didn't feel that anyone else should step in and try to assume her role. On November 22, 1976, two months after the marriage began, Theresa filed for divorce. With Judge Charles Johnson once again presiding, the paperwork became final on December 17, 1976. It was one of Johnson's last court appearances and he retired two months later.

The Edge of Insanity

Following her latest divorce, Theresa's children noticed a remarkable change in her behavior. She started to drink even more and began putting on a great deal of weight. Her attitude became worse with each day and the abuse toward her children severely increased. "When we were kids, my mom beat the shit out of us a lot," her daughter Terry (Theresa) told Dennis McDougal years later. "If we hugged our mom too much, it was like, who were we trying to convince? That we loved her, or she loved us? On the other hand, if we didn't hug and kiss and tell her we loved her, then we didn't love her, and we were evil children. We were demon seeds that had been given to her by Bob Knorr." Terry's older brothers William and Robert agreed. "Sometime around when I turned 10 she started becoming abusive, real short-tempered," William said. "She stopped going out, seeing friends at all, on any level. She got rid of the telephone because she didn't want any people calling. We weren't allowed to have anybody inside the house."

"When I was growing up, I hated The Brady Bunch because I knew that nobody lived like that," said Robert. "I knew that because I knew what my family life was like. Nothing could be more different from the truth than that bullshit TV show. I grew up in an insane asylum basically, but what's worse is we didn't know it was an insane asylum."

The more Theresa drank, the crueler she became. On one occasion she even threw steak knives at her children. During another of her binges, she grabbed Terry by the arm and held a .22-caliber pistol to the girl's head. For months afterward her daughter suffered terrifying nightmares. As if the mental torture was not enough, Theresa started beating the children on a regular basis, forcing them to take turns holding each other down while she administered the blows from above.

Theresa eventually got the idea in her head that Chester Harris had turned her daughter Suesan into a witch. It's not known where the wild idea first came from, but Suesan began taking advantage of it and would use it against her mother. She would regularly say that Harris was going to initiate her into his cult by deflowering her in the name of Satan. The stories did not serve to spare Suesan any abuse and she began suffering the worst of Theresa's blows. Eventually Suesan ran away from home. Her freedom was short-lived and she was eventually picked up by a truancy officer and placed in Sutter Memorial Psychiatric Ward. During her stay at the hospital Suesan told counselors about her family life and regular beatings. When confronted with her daughter's allegations, Theresa claimed her daughter was lying and suffered from mental problems. No one questioned her answer and Suesan was turned over to her mother.

Once back home, Suesan received one of the most severe beatings of her life. Theresa donned a pair of leather gloves and struck her daughter repeatedly. Afterwards, she forced the other children to join in. "We had to pass gloves from one to the other and hit Suesan in the stomach for what she did to the family by running away and everything," Robert recalled to Dennis McDougal years later. "And I had to hit her twice because I didn't hit her hard enough the first time."

Theresa didn't want her daughter running away again, so at night she would handcuff Suesan to the bed and force the other children to take turns keeping watch over her. School was out of the question and Theresa did not permit her daughter to attend. Eventually, Theresa's torment broke Suesan's will and she was allowed to sleep alone and unshackled. Apparently, the fear of another serious beating kept her in line.

Bartering Freedoms

In 1982, Theresa got the wild notion that Suesan was putting spells on her, forcing her to gain weight. Suesan denied the allegations, but her protests fell upon deaf ears and Theresa flew into a violent rage. Before any of the other children knew what was happening, they heard a single shot ring out. Suesan began gasping and fell to the floor. Blood poured out of her chest and she was writhing in pain. Theresa had shot her own daughter with the .22-caliber pistol she had once used to threaten Terry.

After a brief pause, Theresa ordered the other children to carry their injured sister to the bathroom and place her in the tub. Theresa did not want the police involved, so an ambulance was out of the question. The bullet had not passed through Suesan's body, but it was too deep to remove from the open wound. Theresa decided to leave it in and patched her daughter up with gauze and bandages. For the next month, Suesan's sisters looked after her. Terry and Sheila took turns feeding and bathing her and eventually Suesan recovered enough to rejoin the family.

In November 1983, Theresa and her children moved into an apartment in north Sacramento. Things were back to normal for a while, but then in July 1984, Theresa got into a heated argument with Suesan and stabbed her daughter in the back with a pair of scissors. The injuries were not life threatening, but serious nonetheless. Suesan was getting tired of the daily abuse and a few weeks later she asked for permission to move out. Surprisingly, Theresa agreed. But there was one stipulation: Theresa wanted to remove the bullet that remained lodged in her daughter's back. Suesan reluctantly agreed and a few days later the surgery began.

Theresa started the operation by giving her daughter a handful of Mellaril capsules and a quart of hard liquor. The concoction worked and before long Suesan was completely unconscious. Theresa then retrieved an X-Acto knife from the medicine cabinet and ordered 15-year-old Robert to cut into his sister's back and retrieve the bullet. Theresa barked orders from overhead as he made the incision. Before long, he had cut through several layers of skin and muscle tissue. Using his fingers, Robert searched around inside the wound until he finally located and removed the bullet.

The next day Suesan woke up in horrible pain. Theresa gave her antibiotics and ibuprofen, but the medicines didn't seem to have an effect and she kept getting worse. After a few days, her eyes turned yellow and she could no longer control her bowels. At one point, Terry noticed black marks on Suesan's back, which she later concluded were from internal bleeding, a result of Theresa's last beating.

On July 16, 1984, Theresa duct taped Suesan's mouth shut and bound her arms and legs. Afterwards she packed all of the girl's belongings into trash bags and ordered Bill and Robert to put Suesan in the car. They drove south on Highway 89, and eventually pulled off the road by Square Creek Bridge. Bill and Robert were then ordered to take Suesan out of the car and carry her down to the creek bank. Theresa brought down the garbage bags herself and then doused everything, including Suesan, in gasoline and struck a match. Everyone made their way back to the car and no one looked back. Things around the Knorr house remained quiet and sullen during the weeks following Suesan's death, but eventually everything went back to normal.

Jane Doe #6607-85

During late spring 1985, Theresa decided to supplement her small state-assisted income by having 20-year-old daughter Sheila work the streets as a prostitute. Sheila was horrified at her mothers plan, but she was also not going to disobey. Before long, Sheila was bringing home hundreds of dollars a day and Theresa seemed almost proud of her daughter. She eased up on the daily beatings and Sheila was allowed to come and go as she pleased. In a twisted sense, becoming a prostitute had benefited Sheila.

In May 1985, Sheila's freedom was brought to a sudden end. Theresa suspected that her daughter was pregnant and also accused her of having a venereal disease, which Theresa claimed to have gotten by using a toilet. Sheila was beaten black and blue before being hog-tied and locked in a tiny closet next to the bathroom. It was excruciatingly hot within the closet, but Theresa left strict orders for the other children: the door was to be kept closed at all times and they were not permitted to give her any food or water.

"She wanted Sheila to confess," Terry said years later. "That was mother's way. Beat them until they confess." Sheila did eventually confess, but Theresa accused her of lying and the punishment continued. On June 21, 1985, the third day of Sheila's incarceration, the family heard a loud thump coming from the closet. It was the last sound they heard from Sheila. Three days later when they opened the door, they discovered Sheila's decomposing body curled up in a fetal position. Apparently, she had tried to climb up some small shelves in the closet, but they would not hold her weight and she came crashing down.

Theresa grabbed an old cardboard box and filled it with blankets and pillows. She ordered her two sons to place Sheila's remains inside and carry it out to the car. Everyone did as they were told and eventually they were driving up Interstate 80, toward the Truckee Airport. Along the way, Theresa spotted a small field and decided to pull off the road. She ordered the boys to unload their sister's cardboard casket and toss it in the weeds.

A few hours after the box was dropped off, Elmer Barber was making his usual rounds at the Martis Creek Campground and stumbled upon the homemade casket. His curiosity got the best of him and he lifted the flaps of the box open. What he saw inside would prove to haunt him for the rest of his life. Elmer quickly notified the Nevada County Sheriff's Department and within hours the area was swarming with investigators. Nonetheless, they were unable to make a positive identification and there were very few clues to work with. The victim was dubbed Jane Doe #6607-85 and her cause of death was listed as undetermined.

Theresa was extremely paranoid after Sheila 's death and became concerned that the closet contained evidence, which might someday implicate her in her daughter's death. So, on September 29, 1986, Theresa packed up all of the family's belongings and ordered Terry to set the house on fire. Using charcoal lighter fluid, Terry doused the floors and struck a match before climbing out a side window. Regardless of Theresa's intent, neighbors immediately noticed the fire and the local fire department was dispatched to the scene. There was little damage done to the home and investigators had no doubt that the blaze had been started deliberately.

Last Stop

Theresa's children were all but grown by the time she went into hiding. Howard, 26, wanted nothing more to do with the family and his brother, 24-year-old William, moved in with a girlfriend. Terry, Theresa's namesake, also left her mother. She was only 16 at the time, but by using Sheila's identification she was able to pass herself off as 21. Theresa's only remaining child, 19-year-old Robert Wallace Knorr was the only one who stayed by her side and eventually the two moved to Las Vegas.

Things were going well in the beginning, but on November 7, 1991, Robert made a dreadful mistake. Desperate for money, he walked into Red's Place, a bar on North Nellis Boulevard in Las Vegas, and pulled out a gun. The details remain sketchy, but in the end the bartender, Robert Ward, was left dead at the foot of the bar. Investigators arrested Robert for the murder and he was later sentenced to 16 years in jail. Theresa was nervous about all the attention, and a few weeks later she moved to Salt Lake City, Utah.

In 1992, Terry, who had since married, was watching an episode of America's Most Wanted. While none of the cases related to her or her family, they inspired her to do the right thing and she contacted Nevada authorities. Police sergeant Ron Perea of the Nevada County, California, Sheriff's Office received the call. Terry told him that years earlier, her mother and two brothers killed her sister by dousing her with gasoline and setting her afire. The next year, she told them, they killed her other sister and dumped her body in the mountains. Perea was intrigued by the young woman's unbelievable tale and decided to interview her in person. The following day, Perea met with Terry and interviewed her for several hours. He took his notes to the district attorney's office and a task force was assembled to check out the story. Investigators soon discovered the Jane Doe reports and everything started to fall in place.

On November 4, 1993, investigators filed felony complaints against Theresa and two of her sons. William was found in a Sacramento suburb, where he worked at a warehouse and lived in a peaceful neighborhood. Investigators soon learned of Robert's previous arrest and found him in a Nevada County jail. Neither of the boys was interested in talking with investigators, but both eventually relented and confessed to their involvement in both of their sister's deaths. Five days later, California investigators received a call from Salt Lake City authorities, telling them that Theresa had been traced by a driver's license application. She had also been arrested just five days earlier for drunk driving. Sergeant John Fitzgerald of the Placer County Sheriff's Office flew to Salt Lake and headed for the address listed on Theresa's license application. Just before nightfall, he knocked on the door. Surprisingly, Theresa answered without hesitation and was then arrested. Investigators had acted not a moment too soon. Theresa was aware of the investigation and was in the process of packing her belongings. Back at the police station she refused to cooperate and requested a lawyer.


Theresa was charged in the torture slayings of her two daughters and arraigned in a Salt Lake City courtroom on November 15, 1993. According to articles in the Sacramento Bee, she was extradited to Placer County the following month, arraigned before Superior Court Judge J. Richard Couzens and charged with two counts of murder, two counts of conspiracy to commit murder, and two special circumstances—multiple murder and murder by torture—charges, which could result in a death sentence. Theresa pleaded not guilty and was remanded to the Sacramento County Jail. That same day, Judge Couzens ordered William Robert Knorr prosecuted as an adult. Robert eventually struck a deal with prosecutors and agreed to testify against Theresa in exchange for a lighter sentence. One month later, all charges against him, except a single count of conspiracy regarding Sheila's death, were dropped.

When Theresa learned of the deal Robert made with the district attorney's office, she decided she did not want to take her chances with a death sentence and offered to plead guilty in exchange for her life. District Attorney John O'Mara agreed and on October 17, 1995, Theresa changed her plea to guilty. During sentencing, Judge William R. Ridgeway characterized Theresa's crimes as "callousness beyond belief," and sentenced her to two consecutive life sentences. Theresa will be eligible for parole in 2027. If she lives to see it, she will be 80 years old.

Robert, who was still serving out his murder charge in Nevada, was eventually sentenced to three years in state prison. The court ordered the sentence run concurrently with his 1991 murder sentence. William was placed on probation for his role in the murders and ordered to undergo therapy.

On April 9, 2003, The Plain Dealer, a Cleveland, Ohio, newspaper, ran an article entitled: "Searching for answers on mothers who kill." According to the story, an American mother kills her child at the rate of once every three days. "These cases are patterned and predictable," said Michelle Oberman, a legal scholar and expert on women who kill their offspring. "They are not shocking; they are mundane. We just don't want to know what we know."



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