Peggy Cuff was 20 when her body was found in an alley in Denver in November 1979. The cause of death was strangulation. Her murder was one of several unsolved killings of young women in the area that left families without answers for decades.

The initial investigation produced few leads and the case grew cold. Years later, preserved evidence was re-examined with advanced DNA testing and matched to Vincent Groves, a man already serving life in prison for other murders who died in custody in 1996. Because Groves was deceased, no trial for Peggy’s murder could take place, but the DNA link tied her killing to the same offender responsible for other 1979 strangulations, including Emma Jenefor and Joyce Ramey.