The person at the center of this case
Steven Anderson (age 17) and David Williams (age 12)
Missing Person · Open
51 years waiting · since 1975
STEVEN ANDERSON
Justice for Steven Anderson (age 17) and David Williams (age 12) — the trail went cold in 1975, but the truth hasn't.
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Key leads to think about
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person
Lead #1Why were two developmentally disabled boys able to leave the supervised ball field unsupervised, and what happened during their walk back to their residence?
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location
Lead #2The New Lisbon State School encompasses 1,896 acres in the New Jersey Pinelands—could the boys have become lost on the grounds or ventured into the surrounding area?
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evidence
Lead #3Steven was wearing a blue hooded jacket and blue pants and had a chipped front tooth; has anyone reported seeing a boy matching this description in the years following 1975?
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, where both boys resided due to developmental disabilities. The two were last seen at approximately 4:15 p.m. walking from a ball field toward their residence and have never been found. Nearly 50 years later, the circumstances of their disappearance remain unexplained, and investigators seek any information about what happened to these two vulnerable young men.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
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witness
Lead #4Staff members were present at the ball field when the boys left—what did they observe, and were there any other individuals in the area that day?
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
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1975-04-07
16:15Last Sighting
Steven Anderson and David Williams last seen at approximately 4:15 p.m. walking from a ball field toward their residence at the New Lisbon State School.
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1975-04-07
Reported Missing
Steven Anderson (age 17) and David Williams (age 12) reported missing from the New Lisbon State School in Burlington County, New Jersey.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:April 7, 1975 at 4:15 PM
Last Updated:October 22, 2026
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Case Information
Incident:April 7, 1975 at 4:15 PM
Last Updated:October 22, 2026