Their only known victim after 1979 was their
daughter Heather, although the police believe the couple
murdered
more. There were no known murders in the years 1976–1977, 1980–1986
and 1988-1992.
During questioning after being arrested, Fred West had
confessed to murdering up to 30 people,
but the police believed the
pair may have killed only 13.
As well as the 12 confirmed they believe
West also killed 15-year-old Mary Bastholm in 1968,
but to date no
body has been found. West's son, Stephen, has said he firmly believed
the missing Gloucester teenager was an early victim of his father, as
Fred West had
reportedly boasted of committing Miss Bastholme's murder
while on remand
in prison during 1994.