The person at the center of this case
Steven Anderson (age 17 at time of disappearance)
Missing Person · Open
51 years waiting · since 1975
STEVEN ANDERSON
Justice for Steven Anderson (age 17 at time of disappearance) — the trail went cold in 1975, but the truth hasn't.
Start here
Key leads to think about
👤
person
Lead #1What happened to David Williams, Steven's 12-year-old roommate, who disappeared with him?
👁️
witness
Lead #2Were there staff members or other residents at the facility who witnessed the boys leaving or had contact with them after 4:15 p.m.?
📍
location
Lead #3Why were two boys with developmental disabilities able to leave a supervised residential facility unsupervised?
Steven Anderson, age 17, and his roommate David Williams, age 12, disappeared on April 7, 1975, from the New Lisbon State School in Burlington County, New Jersey, while walking from a ball field back to their residence. Both boys had developmental disabilities and required supervision, making their sudden disappearance highly unusual and concerning. Despite decades of investigation, their whereabouts remain unknown, and anyone with information about their fate is urged to come forward.
Try asking
Claim this imported case
A one-time $10 claim transfers this imported case workspace to your account. You get 10 uploads for this case, 25 daily AI questions for this case, and public tips with files route to you.
10 uploads25 AI questions/day
This does not start a subscription. When the included limits are reached, the Personal plan unlocks more workspace capacity.
More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
🔍
evidence
Lead #4Steven was last seen wearing a blue hooded jacket and blue pants—have these items ever been recovered?
💡
clue
Lead #5Steven had a chipped front tooth and trouble communicating—could he have been identified or located by someone who encountered him?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
April 7, 1975 New Lisbon, Burlington County, New Jersey Steven Anderson, then age 17, and David Williams , then age 12, 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.
Remarks: Steven had a chipped front tooth. He was known to have trouble communicating.
Steven was last seen wearing a blue hooded jacket and blue pants.
Timeline of Events
👁️
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 towards their residence at the New Lisbon State School.
👤
1975-04-07
Reported Missing
Steven Anderson and David Williams were reported missing from the New Lisbon State School on April 7, 1975.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:April 7, 1975 at 4:15 PM
Last Updated:May 19, 2026
Leave a comment
Comments
Case Information
Incident:April 7, 1975 at 4:15 PM
Last Updated:May 19, 2026