The person at the center of this case
Steven Anderson (age 17 at time of disappearance)
Missing Person · Open - Unsolved
STEVEN ANDERSON
Steven Anderson, age 17, and David Williams, age 12, disappeared from the New Lisbon State School in Burlington County, New Jersey on April 7, 1975. Both boys had developmental disabilities and were last seen at 4:15 p.m. walking from a ball field toward their residence. The case remains unsolved and is being investigated by the FBI.
New Lisbon, Burlington County, New Jersey
🏛️ Federal Bureau of Investigation (FBI) - Newark Field Office
Case Summary
Steven Anderson, age 17, and David Williams, age 12, disappeared from the New Lisbon State School in Burlington County, New Jersey on April 7, 1975. Both boys had developmental disabilities and were last seen at 4:15 p.m. walking from a ball field toward their residence. The case remains unsolved and is being investigated by the FBI.
Timeline of Events
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1975-04-07
16:15Last Sighting
Steven Anderson and David Williams were last seen at approximately 4:15 p.m. walking from a nearby ball field toward their residence at the New Lisbon State School.
Key Locations
Interactive map showing important locations related to this case
Points of Interest / Key Leads
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person
Lead #1David Williams, age 12, missing companion of Steven Anderson
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evidence
Lead #2Steven Anderson had a chipped front tooth and wore a blue hooded jacket and blue pants at time of disappearance
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clue
Lead #3Steven had trouble communicating due to developmental disability
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location
Lead #41,896-acre New Lisbon State School campus in the New Jersey Pinelands
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Case Information
Case Type:
Missing Person
Status:
Open - Unsolved
Case Number:271
Started:April 7, 1975 at 4:15 PM
Last Updated:April 26, 2026