Crime Solvers Central
Crime Solvers Central
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 (MP115776) and 6 other sources
Carlos Alberto Diaz-Martinez, a 35-year-old man from Fremont, California, was last seen on December 30, 2023. He was reported missing after leaving his residence on Laurel Street. Authorities are particularly concerned for his well-being, as there is fear that he may have been considering harming himself.

Diaz-Martinez is described as having shoulder-length black hair, brown eyes, a goatee, and standing about 5 feet 5 inches tall, weighing approximately 140 pounds. At the time of his disappearance, he was wearing a black jacket, jeans, a gray hat, and red Vans sneakers. He was possibly carrying a blue backpack with tan leather accents, but did not have a cell phone with him, raising additional concerns. There is also uncertainty about whether he took his skateboard when he left his home.

His last known intended destination was Aquatic Park Cove in San Francisco, but it remains unclear if he ever arrived there. The Fremont Police Department is actively seeking help from the public to locate him, urging anyone with information to contact them immediately.

Last Seen: Dec 30, 2023

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.

80%Moderate
John Doe — Manteca, California
UP116767 • Found Feb 21, 2024
View case
Sex ✓Male
Age 78%Est. 38–52 vs 35
Race 100%Hispanic
Location 90%48 mi away, same state
TimingFound 8 weeks after last seen
Height 100%5'5" vs 5'5"
Weight 77%170 lb vs 140 lb
Hair 100%Black vs Black
75%Possible
John Doe — Riverside, California
UP160854 • Found May 27, 2025
View case
Sex ✓Male
Age 100%Est. 28–42 vs 35 when missing
Race 100%Hispanic
Location 39%356 mi away, same state
TimingFound 17 months after last seen
Height 100%5'6" vs 5'5"
Weight 100%135 lb vs 140 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.