On a spring afternoon in 1986 Dennis M. Diamond, 34, left his Franklin Township, New Jersey, home with a friend, Donald Peterson. Diamond, a house builder and father of four, told his wife to start dinner and said they would be back in about an hour and a half. They were reportedly driving Diamond’s black 1984 Buick Regal toward Philadelphia and were last seen that day; both men were reported missing on April 25, 1986.

Diamond left behind all of his personal belongings, including eyeglasses he needed for night vision. Police later found a meth lab in a converted chicken coop on the property where both men lived; Diamond was Peterson’s landlord and a warrant was issued for Peterson. On April 11, 1988, Diamond’s Buick was recovered in an Acme parking lot in Upper Darby with an altered VIN; a Warlocks motorcycle club member had been seen driving it but he died of a drug overdose before questioning.

A 1997 search of private property in Woolwich Township for possible burial sites turned up nothing. Foul play is suspected, and the case has produced few leads since the first investigation. If anyone knew Dennis’s movements that day, his routes between Franklin Township and Philadelphia, or the people who had access to his car, please come forward with information.