Juanita Cummings is serving a life sentence for Mayo's murder. Sherry Cummings is serving a 35-year-sentence for allowing child abuse and being accessory to a crime after the fact.

During his clemency hearing in August, Cummings continued to deny his role in the crime. The Pardon and Parole Board denied his request.

International anti-death penalty groups had rallied against Cummings' execution, but no protesters were outside the gate of the prison in McAlester before the execution.

While Cummings denied his role in the crime, Attorney General Drew Edmondson said the state proved its case.

"Cummings was properly convicted and sentenced to death for the murder of Melissa Moody,” Edmondson said. "Appeals courts at every level have upheld this conviction and sentence. My thoughts are with the family and friends of Melissa and her mother, Judy.”