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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 (MP9684) and 13 other sources
In the summer of 1992, a family in Las Cruces, New Mexico, was forever changed by the disappearance of 16-year-old Sergio Martinez. On July 30th of that year, Sergio was seen for the last time, and the vibrant life of a teenage boy seemingly vanished without a trace. At the time of his disappearance, he was described as a Hispanic male with brown hair and brown eyes. He had a noticeable characteristic: a missing front tooth. When he was last seen, he was wearing a maroon shirt with black stripes and gray pants. The circumstances surrounding what happened on that late July day remain a mystery, leaving his loved ones with unanswered questions that have echoed through the decades.

The initial report of Sergio's disappearance was filed with the Las Cruces Police Department, marking the beginning of a long and frustrating investigation. Despite the efforts of law enforcement, the crucial early days of the search yielded no significant leads that could illuminate his whereabouts. The passage of time has only deepened the complexity of the case, transforming it from an active search to a cold case burdened by the silence of the years. The lack of witnesses and concrete evidence has been a significant impediment, creating a void of information that has been difficult for both investigators and Sergio's family to navigate. The hope of finding answers has been kept alive by the ongoing efforts of missing persons organizations who continue to keep his case in the public eye.

Decades have now passed since Sergio Martinez was last seen, and his case remains an open and painful chapter for his family and the community of Las Cruces. The emotional toll on his loved ones is immeasurable, a continuous cycle of hope and despair fueled by the absence of closure. The investigation into his disappearance is a somber reminder of the many long-unsolved missing person cases that linger in the hearts and minds of those left behind. The overview of Sergio's case is one of abrupt and unexplained absence; a young man on the cusp of his life, gone without a word, leaving a legacy of questions and an enduring search for truth. His family and investigators continue to seek any piece of information that might finally bring him home or provide the answers they have been desperately seeking for over thirty years.

Last Seen: Jul 30, 1992

Possible Unidentified Matches (6)

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.

81%Moderate
John Doe — Texas
UP3246 • Found Jan 13, 2004
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Sex ✓Male
Age 100%Est. 25–35 vs 16 when missing
Race 100%White
Location 90%47 mi away
TimingFound 11 years after last seen
Height 84%5'10" vs 5'8"
Weight 100%127 lb vs 118 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
79%Possible
John Doe — Texas
UP3676 • Found Sep 27, 1996
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Sex ✓Male
Age 100%Est. 19–24 vs 16 when missing
Race 100%White
Location 90%47 mi away
TimingFound 4 years after last seen
Height 100%5'8" vs 5'8"
Weight 47%157 lb vs 118 lb
Hair 60%Black vs Brown
79%Possible
John Doe — Rural, New Mexico
UP9544 • Found Sep 13, 1996
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Sex ✓Male
Age 100%Est. 20–30 vs 16 when missing
Race 100%White
Location 87%59 mi away, same state
TimingFound 4 years after last seen
Height 52%5'4" vs 5'8"
Weight 96%132 lb vs 118 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
79%Possible
John Doe — Roswell, New Mexico - unidentified case UP9539
John Doe — Roswell, New Mexico
UP9539 • Found Jul 26, 1996
View case
Sex ✓Male
Age 100%Est. 20–30 vs 16 when missing
Race 100%White
Location 65%150 mi away, same state
TimingFound 4 years after last seen
Height 100%5'7" vs 5'8"
Weight 93%102 lb vs 118 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
78%Possible
John Doe — Texas
UP3732 • Found May 19, 1995
View case
Sex ✓Male
Age 86%Est. 20–30 vs 16 when missing
Race 100%White
Location 90%47 mi away
TimingFound 3 years after last seen
Height 84%5'6" vs 5'8"
Weight 52%155 lb vs 118 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
75%Possible
John Doe — Santa Teresa, New Mexico
UP134704 • Found Jul 19, 2024
View case
Sex ✓Male
Age 100%Est. 20–30 vs 16 when missing
Race 100%White
Location 94%31 mi away, same state
TimingFound 32 years after last seen
Height 75%5'0"–5'8" vs 5'8"
Hair 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.

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