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 (MP51103) and 5 other sources
Ruben Martinez, a 30-year-old man from Concord, California, was last seen on the night of February 13, 2000. His wife reported that he had been asleep when she left for the store, but upon returning two hours later, Martinez had left their home. He was driving a red 1992 Toyota truck. Shortly afterward, he contacted his wife, explaining that he had gone to Pleasant Hill and would return soon, but he never did.

Weeks later, on April 2, 2000, his truck was discovered submerged in the Sacramento River near Walnut Grove. Divers found the vehicle after it was spotted by a passing trucker, but there were no signs indicating that anyone had drowned inside or safely exited the vehicle. Since then, there has been no further contact from Martinez, and his case remains unsolved. The police continue to seek information on his disappearance, hoping to find answers.
Last Seen: Feb 13, 2000

Possible Unidentified Matches (9)

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.

80%Moderate
John Doe — Westley, California
UP11031 • Found Jun 15, 2006
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Sex ✓Male
Age 100%Est. 18–30 vs 30 when missing
Race 100%Hispanic
Location 87%56 mi away, same state
TimingFound 6 years after last seen
Height 100%5'5" vs 5'4"
Weight 93%135 lb vs 156 lb
80%Moderate
John Doe — Oakland, California
UP160748 • Found Jul 7, 2022
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Sex ✓Male
Age 100%Est. 18–32 vs 30 when missing
Race 100%Hispanic
Location 97%21 mi away, same state
TimingFound 22 years after last seen
Height 100%5'3" vs 5'4"
Weight 89%132 lb vs 156 lb
Eyes 100%Brown vs Brown
79%Possible
John Doe — Manteca, California
UP116767 • Found Feb 21, 2024
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Sex ✓Male
Age 100%Est. 38–52 vs 30 when missing
Race 100%Hispanic
Location 90%47 mi away, same state
TimingFound 24 years after last seen
Height 100%5'5" vs 5'4"
Weight 100%170 lb vs 156 lb
Hair 100%Black vs Black
78%Possible
John Doe — Stockton, California
UP87360 • Found Jun 19, 2021
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Sex ✓Male
Age 85%Est. 50–70 vs 30 when missing
Race 100%Hispanic
Location 94%34 mi away, same state
TimingFound 21 years after last seen
Height 100%5'5"–5'7" vs 5'4"
Weight 74%110–120 lb vs 156 lb
Hair 70%Gray vs Black
Eyes 100%Brown vs Brown
76%Possible
John Doe — Vallejo, California
UP17598 • Found Sep 2, 2003
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Sex ✓Male
Age 100%Est. 25–35 vs 30 when missing
Race 60%White
Location 99%13 mi away, same state
TimingFound 4 years after last seen
Height 100%5'5" vs 5'4"
Hair 40%Gray vs Black
76%Possible
John Doe — Iselton, California
UP2365 • Found Feb 18, 2002
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Sex ✓Male
Age 100%Est. 23–35 vs 30 when missing
Race 60%White
Location 96%24 mi away, same state
TimingFound 2 years after last seen
Height 100%5'5" vs 5'4"
Weight 2%79 lb vs 156 lb
Hair 100%Black vs Black
76%Possible
John Doe — Salinas, California
UP131069 • Found Mar 20, 2023
View case
Sex ✓Male
Age 100%Est. 38–52 vs 30 when missing
Race 100%Hispanic
Location 76%96 mi away, same state
TimingFound 23 years after last seen
Height 84%5'2" vs 5'4"
Weight 70%117 lb vs 156 lb
Hair 100%Black vs Black
Eyes 100%Brown vs Brown
76%Possible
John Doe — Fresno, California - unidentified case UP145848
John Doe — Fresno, California
UP145848 • Found Sep 5, 2007
View case
Sex ✓Male
Age 97%Est. 38–52 vs 30 when missing
Race 100%Hispanic
Location 64%153 mi away, same state
TimingFound 8 years after last seen
Height 84%5'2" vs 5'4"
Weight 100%171 lb vs 156 lb
Hair 100%Black vs Black
Eyes 100%Brown vs Brown
75%Possible
John Doe — Wilton, California - unidentified case UP16897
John Doe — Wilton, California
UP16897 • Found Apr 2, 2012
View case
Sex ✓Male
Age 85%Est. 25–45 vs 30 when missing
Race 60%White
Location 89%51 mi away, same state
TimingFound 12 years after last seen
Height 100%5'5" vs 5'4"
Weight 100%151 lb vs 156 lb
Hair 100%Black vs Black
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.