On the afternoon of April 19, 1986, 37-year-old Donald Peterson was last seen in Franklin Township, Gloucester County, New Jersey. He was with his acquaintance, Dennis Diamond, and the two men were reportedly heading to Philadelphia in Diamond's black 1984 Buick Regal. Before they left, Diamond told his wife they would only be gone for about an hour and a half and to start dinner. However, neither Peterson nor Diamond ever returned home, and they were officially reported missing on April 25, 1986. Peterson, who was born on June 6, 1948, was sometimes known by the nicknames "Guppi" or "Don."
The investigation into the disappearance of Donald Peterson and Dennis Diamond soon took a turn when authorities discovered an abandoned methamphetamine lab in a converted chicken coop on Peterson's property. This discovery led to an arrest warrant being issued for Peterson. For two years, there were no significant breaks in the case.
Then, on April 11, 1988, Dennis Diamond's Buick Regal was located in the parking lot of an Acme Market in Upper Darby, Pennsylvania. Investigators found that the vehicle identification number on the dashboard had been altered. The car was reportedly being driven by a member of the Warlocks Motorcycle Club, but when police went to question him, they learned he had died of a drug overdose. Foul play is suspected in the disappearance of both men.
Over the years, the case grew cold, with few leads to follow. In 1997, a tip surfaced suggesting that the bodies of Peterson and Diamond were buried on private property in Woolrich Township, but a thorough search of the area yielded no evidence. Despite the passage of time, the case of Donald Peterson and Dennis Diamond remains unsolved. The discovery of the drug lab and the later connection to a motorcycle club member who died of an overdose suggest a potential link to criminal activity, but no definitive answers have ever been found. The families of both men were left with questions and no closure, as the promising afternoon trip to Philadelphia ended in a mysterious and enduring disappearance.Last Seen: Apr 19, 1986
