Details:

David Williams, then age 12, and Steven Anderson, then age 17, were reported missing from the New Lisbon State School, now called the New Lisbon Developmental Center, located in Burlington County, New Jersey, on April 7, 1975.  Both boys lived at the 1,896-acre center located off Route 72 in the New Jersey Pinelands.  They had diagnosed developmental disabilities and were unable to care for themselves without supervision.  The boys, who were roommates, were last seen at approximately 4:15 p.m., walking towards their residence from a nearby ball field where they had been playing with staff members.