Crime Solvers Central
Crime Solvers Central
302 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 (MP56994) and 8 other sources
Mark Herbert Thornton, a 63-year-old resident of Milpitas, California, went missing on March 7, 2019. That day, he left his residence on Coelho Street around 11:30 a.m. and was last seen walking on foot. Thornton was considered "at risk" due to his need for medication to manage various medical conditions, including blood pressure issues, which he left behind. He was last seen wearing a red vest, black jeans, and gray hiking shoes.

Thornton had faced challenges in the years leading up to his disappearance. Five years earlier, he had lost his job and had been living off his savings. On the day of his disappearance, he had a conversation with his wife about financial issues after discovering their account was overdrawn. His wife left for an hour, and when she returned, he was gone. He had prepared for the evening, laying out his pajamas and washing dishes, but he never returned home. His phone was turned off, and there has been no contact from him since.

Despite search efforts, including assistance from local authorities and search and rescue teams, Thornton's whereabouts remain unknown. He is described as 5'9", weighing 164 pounds, with graying black hair and blue eyes. His case remains open, and authorities continue to seek information from the public.

Last Seen: Mar 7, 2019

Possible Unidentified Matches (5)

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.

82%Moderate
John Doe — San Francisco, California
UP91361 • Found Feb 5, 2022
View case
Sex ✓Male
Age 100%Est. 60–70 vs 63 when missing
Race 100%White
Location 92%41 mi away, same state
TimingFound 3 years after last seen
Height 100%5'9" vs 5'7"–5'10"
Weight 94%191 lb vs 150–170 lb
Hair 100%Gray vs Gray
Eyes 0%Brown vs Blue
77%Possible
John Doe — Fresno, California - unidentified case UP128534
John Doe — Fresno, California
UP128534 • Found Jan 4, 2024
View case
Sex ✓Male
Age 94%Est. 48–62 vs 63 when missing
Race 100%White
Location 70%126 mi away, same state
TimingFound 5 years after last seen
Height 100%5'6"–5'8" vs 5'7"–5'10"
Weight 89%115–125 lb vs 150–170 lb
Hair 100%Gray vs Gray
76%Possible
Unidentified Person — San Jose, California
UP146518 • Found Nov 10, 2023
View case
Age 79%Est. 40–60 vs 63 when missing
Race 100%White
Location 100%6 mi away, same county
TimingFound 5 years after last seen
Height 100%5'6" vs 5'7"–5'10"
75%Possible
John Doe — Menifee, California
UP100667 • Found Sep 9, 2021
View case
Sex ✓Male
Age 100%Est. 58–72 vs 63 when missing
Race 100%White
Location 38%370 mi away, same state
TimingFound 3 years after last seen
Height 100%5'9" vs 5'7"–5'10"
Weight 100%151 lb vs 150–170 lb
Hair 100%Gray vs Gray
Eyes 100%Blue vs Blue
75%Possible
John Doe — San Francisco, California
UP147165 • Found Jun 17, 2020
View case
Sex ✓Male
Age 60%Est. 18–100 vs 63 when missing
Race 100%White
Location 93%37 mi away, same state
TimingFound 15 months after last seen
Height 84%6'0" vs 5'7"–5'10"
Weight 100%172 lb vs 150–170 lb
Hair 40%Black vs Gray

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.