On a spring afternoon in 1975, 17-year-old Steven Eugene Anderson, known as Teeve, vanished from the New Lisbon State School in the Pinelands of Burlington County, New Jersey. He and a 12-year-old roommate, David Williams, were seen playing on a ball field and were last seen walking from the field toward their cottage at about 4:15 p.m. Staff reported them missing that evening when they did not return.

Steven, a resident of Westville, New Jersey, had brown hair, hazel-blue eyes and a chipped upper front tooth. He was described as unable to care for himself because of a moderate developmental disability that made communication difficult. On the day he disappeared he wore a blue hooded jacket and blue pants.

Searches of the 1,896-acre campus involved the New Jersey Human Services Police Department, New Jersey State Police and the Air National Guard, which used helicopters and bloodhounds, but no trace of either boy was found. The disappearance remains unsolved; the FBI added the case to its website in 2017. The facility later recorded another unexplained disappearance in 1982, but no proven connection has been established.

If anyone knew Steven, his routine at New Lisbon, or saw him or a young boy leaving the campus that afternoon, please share what you remember.