David Edward Williams, a 12-year-old resident of the New Lisbon State School, disappeared on April 7, 1975. He was last seen at about 4:15 p.m. on the school grounds after playing at a ball field with his 17-year-old roommate, Steven Anderson, and some staff. The two boys were seen walking back toward their residence but never arrived.

David was a Black male, 5 feet 0 inches and 113 pounds, with black hair and brown eyes. He had developmental disabilities and epilepsy, required daily medication to prevent grand mal seizures, and did not have his medication when he vanished. He often wore a protective helmet and was reportedly wearing it that day. The campus covered 1,896 acres in the New Jersey Pinelands; extensive searches by state police, Human Services Police and the Air National Guard using helicopters and bloodhounds found no trace of the boys.

The disappearance remains unsolved and has been re-examined by investigators in later years. If anyone knew David, Steven, or their routines at the New Lisbon State School in 1975, please share information that might help the case.