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Case Description

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Summary based on the NamUs case record (MP56897) and 5 other sources
Martin Sanchez was 31 years old when he was last seen in Oceanside, California, on December 30, 2013. The Hispanic male had recently gone through an abrupt change in his living situation. He had been sharing a residence with roommates when he unexpectedly moved out, leaving his property behind rather than taking his belongings with him. After leaving that home, Martin began staying with his aunt, where he remained for approximately a month. On the evening of December 30, at about 6:00 p.m., Martin left his aunt’s residence. He never returned, and his family did not hear from him again. What may have seemed at first like an ordinary departure became increasingly troubling as the hours and days passed without any word from him and without an explanation for why he had left.

Martin’s disappearance was reported to the Oceanside Police Department, which assigned the investigation case number 14003189. Records describe him as approximately six feet tall and weighing about 200 pounds. He had brown hair and black eyes and possessed identifying physical features that could help distinguish him, including a scar associated with having his appendix removed and a tattoo depicting human skulls on his arm. No particular clothing description was documented for the day he disappeared, and no vehicle or other form of transportation was identified in connection with his departure. Those missing details left investigators and his family with little information about where he may have intended to go or how far he could have traveled after leaving his aunt’s home.

As the investigation continued, efforts were made to ensure that Martin could be identified if information surfaced elsewhere. DNA reference samples from his mother and sister were collected and processed through the California Department of Justice’s Missing Persons DNA Program. Available records indicate that STR DNA from both relatives was used and uploaded to CODIS, while mitochondrial DNA from his mother was also available for comparison. These genetic records provide investigators with another means of comparing unidentified remains or other forensic evidence with Martin’s family. Despite the development of those identification resources, the known account of his disappearance remains centered on the relatively brief sequence of events before he vanished: he unexpectedly left the residence he had shared with roommates, left his possessions behind, spent roughly a month living with his aunt, and then walked away from her home at approximately 6:00 p.m. on December 30, 2013. His family’s communication with him ended at that point, leaving the circumstances of where he went and what happened afterward unknown. In overview, Martin Sanchez’s case is marked by a sudden break from his previous living situation, an unexplained departure from his aunt’s home, the absence of subsequent contact with his family, and a documented investigative effort to preserve identifying information that could someday help explain what happened after he was last seen in Oceanside.

Last Seen: Dec 30, 2013

Possible Unidentified Matches (10)

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.

84%Moderate
John Doe — Vista, California
UP76365 • Found Nov 26, 2020
View case
Sex ✓Male
Age 100%Est. 28–42 vs 31 when missing
Race 100%Hispanic
Location 100%9 mi away, same county
TimingFound 7 years after last seen
Height 52%5'8" vs 6'0"
Weight 63%255 lb vs 200 lb
Hair 60%Black vs Brown
Eyes 90%Brown vs Black
Physical features: Tattoo: skull
80%Moderate
John Doe — San Ysidro, California
UP89850 • Found Jan 29, 2021
View case
Sex ✓Male
Age 100%Est. 30–45 vs 31 when missing
Race 100%Hispanic
Location 90%48 mi away, same county
TimingFound 7 years after last seen
Height 68%5'9" vs 6'0"
Weight 100%190 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 100%Black vs Black
79%Possible
John Doe — San Diego, California - unidentified case UP54015
John Doe — San Diego, California
UP54015 • Found Mar 10, 2015
View case
Sex ✓Male
Age 100%Est. 25–35 vs 31 when missing
Race 100%Hispanic
Location 90%48 mi away, same county
TimingFound 14 months after last seen
Height 68%5'6"–5'9" vs 6'0"
Weight 90%160–170 lb vs 200 lb
77%Possible
John Doe — San Diego, California - unidentified case UP110585
John Doe — San Diego, California
UP110585 • Found Oct 14, 2023
View case
Sex ✓Male
Age 100%Est. 30–35 vs 31 when missing
Race 60%White
Location 94%31 mi away, same county
TimingFound 10 years after last seen
Height 100%5'11" vs 6'0"
Weight 100%215 lb vs 200 lb
Hair 60%Black vs Brown
Eyes 90%Brown vs Black
77%Possible
John Doe — Los Angeles, California - unidentified case UP12864
John Doe — Los Angeles, California
UP12864 • Found Feb 13, 2014
View case
Sex ✓Male
Age 85%Est. 28–50 vs 31
Race 60%White
Location 81%78 mi away, same state
TimingFound 6 weeks after last seen
Height 100%5'7"–6'0" vs 6'0"
Weight 100%175–190 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 90%Brown vs Black
76%Possible
John Doe — Riverside, California - unidentified case UP118444
John Doe — Riverside, California
UP118444 • Found Aug 18, 2022
View case
Sex ✓Male
Age 100%Est. 28–42 vs 31 when missing
Location 90%48 mi away, same state
TimingFound 9 years after last seen
Height 52%5'8" vs 6'0"
Weight 100%198 lb vs 200 lb
Hair 40%Gray vs Brown
Eyes 90%Brown vs Black
Physical features: Tattoo: skull
76%Possible
John Doe — Calexico, California - unidentified case UP14740
John Doe — Calexico, California
UP14740 • Found Jul 28, 2015
View case
Sex ✓Male
Age 85%Est. 20–40 vs 31 when missing
Race 100%Hispanic
Location 72%114 mi away, same state
TimingFound 19 months after last seen
Height 20%5'6" vs 6'0"
Weight 90%170 lb vs 200 lb
Hair 60%Black vs Brown
Eyes 90%Brown vs Black
Physical features: Tattoo: skull
76%Possible
John Doe — Los Angeles, California - unidentified case UP12379
John Doe — Los Angeles, California
UP12379 • Found Jan 26, 2014
View case
Sex ✓Male
Age 85%Est. 25–45 vs 31
Race 100%Hispanic
Location 83%73 mi away, same state
TimingFound 4 weeks after last seen
Height 52%5'3"–5'8" vs 6'0"
Weight 80%150–160 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 90%Brown vs Black
75%Possible
John Doe — Los Angeles, California - unidentified case UP79792
John Doe — Los Angeles, California
UP79792 • Found Mar 7, 2015
View case
Sex ✓Male
Age 47%Est. 40–64 vs 31 when missing
Race 100%Hispanic
Location 81%78 mi away, same state
TimingFound 14 months after last seen
Height 100%5'6"–5'11" vs 6'0"
Weight 90%170 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 90%Brown vs Black
75%Possible
John Doe — Los Angeles, California - unidentified case UP154628
John Doe — Los Angeles, California
UP154628 • Found Dec 8, 2025
View case
Sex ✓Male
Age 100%Est. 40–50 vs 31 when missing
Race 100%Hispanic
Location 81%78 mi away, same state
TimingFound 12 years after last seen
Height 68%5'7"–5'9" vs 6'0"
Weight 80%150–160 lb vs 200 lb
Hair 60%Black vs Brown
Eyes 90%Brown vs Black

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.

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