Deborah Osborne was a 17-year-old white female from Toms River, New Jersey, who disappeared in early April 1982; later reporting tied her last-known timeline to April 8, 1982, the day she was reported missing, while prosecutors later dated the killing to April 7. For months there was no trace until spring 1983, when investigators digging in the Staten Island backyard of Richard Fran Biegenwald’s mother unearthed human remains from a makeshift grave. Contemporary coverage described Osborne’s body as recovered nearby and said she had been killed with multiple stab wounds.

Authorities linked Biegenwald to multiple buried victims after an associate, Dherran Fitzgerald, cooperated and helped point investigators toward graves that explained how bodies from New Jersey shore towns turned up on Staten Island. Court records show Biegenwald was indicted on separate charges that included the murder of Deborah Osborne and was later convicted in cases that included her killing.

Who knew Deborah, where she spent time in April 1982, or have information about her last confirmed movements?