On April 7, 1975, 12-year-old David was last seen at the New Lisbon State School for Retarded Males off Highway 72 in New Lisbon, New Jersey at approximately 4:30 p.m.
David was a student at the school and was accompanied by another student, 17-year-old Steven Anderson. The boys (who were roommates) were walking towards their residence on the campus after playing at a nearby ball field with some staff members.
Neither of them have been seen again.
Curiously, Steven and David are not the only New Lisbon State School residents who went missing and were never heard from again; in 1982, a 46-year-old man named Kenneth Schweighart disappeared from the school, but it hasn't been proven that the disappearances are related.
Since then, the New Lisbon State School is now coed and known as the New Lisbon Developmental Center.
David is described as an African-American male with black hair, brown eyes, a height of 5'0 and weighs 113 pounds. He was last seen wearing a dark-colored polo shirt, a small blue corduroy jacket, striped pants and a protective seizure helmet.
David is mentally disabled and suffers from epileptic seizures. He's required to take daily medications, but he did not have his medicine with him when he disappeared.