Anna Duval, a 62-year-old white woman from Arizona, was found dead on May 15, 1977, in a field near the Philadelphia International Airport. Her body had suffered three gunshot wounds to the head. She had traveled to Philadelphia seeking to reclaim life savings she believed had been taken in a real estate scam.

The man she went to meet was identified as John Martini. He had a long criminal history that included robbery, kidnapping, extortion and multiple murders in several states. A forensic sculptural bust made from Duval’s skull was circulated and led to her identification when a police officer matched it to a missing persons report. Martini was later extradited to Philadelphia, tried in 1997, convicted of Duval’s murder and sentenced to life in prison.

Anyone who knew Anna, her travels to Philadelphia in 1977, or the circumstances of the scam and meeting with John Martini is asked to share information that could fill missing details in this case.