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298 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP14587) and 2 other sources
On a cold day in Shoreline, Washington, 62-year-old Thomas Christopher Anderson, also known as Tom, vanished from his group home. It was December 27, 2010, when he was last seen, leaving behind a life that required consistent care and support. Anderson is described as a white male with graying hair that is very thin in the front, brown eyes, and he may have a gray mustache. At the time of his disappearance, he was 5 feet 10 inches tall and weighed 280 pounds. He was inadequately dressed for the cold weather, wearing only a blue t-shirt and unknown pants. Thomas, who is considered a dependent adult with a mild intellectual disability, could not function on his own and his speech was difficult to understand.

The circumstances surrounding Thomas Anderson's disappearance are troubling. On the day he went missing, he removed his GPS tracking device and left the group home without any of his personal belongings, including his identification. Although he knew how to use the public bus system, he typically did so with the assistance of others. Adding to the mystery, his wallet, containing his bus pass, was later found at a nearby secondhand store, but it could not be determined when it had been left there. This discovery left investigators with few leads and deepened the concern for his well-being. Staff from his group home conducted extensive searches in transient areas of Seattle, but their efforts were unsuccessful in locating him.

The investigation into Thomas Anderson's disappearance has been handled by the King County Sheriff's Office. Despite the passage of time, there has been no indication of his whereabouts since the day he walked away from his group home. His case is classified as an endangered missing person due to his medical conditions and his vulnerability. The lack of any new information or sightings has left his case unsolved, a lingering question for law enforcement and a source of ongoing concern for those who knew him. The story of Thomas Anderson is a poignant reminder of the challenges faced by vulnerable adults and the lasting impact of a person's unexplained absence.

Last Seen: Dec 27, 2010

Possible Unidentified Matches (2)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

77%Possible
John Doe — Fall City, Washington
UP87184 • Found Jul 23, 2020
View case
Sex ✓Male
Age 100%Est. 48–62 vs 62 when missing
Race 100%White
Location 96%24 mi away, same county
TimingFound 10 years after last seen
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
77%Possible
John Doe — Seattle, Washington - unidentified case UP163249
John Doe — Seattle, Washington
UP163249 • Found Jul 4, 2026
View case
Sex ✓Male
Age 60%Est. 18–100 vs 62 when missing
Race 100%White
Location 100%6 mi away, same county
TimingFound 16 years after last seen
Height 100%5'10" vs 5'10"
Weight 84%229 lb vs 280 lb
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.