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 (MP41342) and 4 other sources
Gabriel Perenda Duenas, a 48-year-old man, was last seen at his workplace in San Francisco, California, on April 8, 1987. Standing 5'6" tall and weighing approximately 130 pounds, Gabriel was wearing a white shirt, blue jeans, and a pink vest when he disappeared. He had brown hair and brown eyes, and was also known to use the alias "Rick Gabe."

Very few details surrounding the circumstances of his disappearance have surfaced over the years, and his case remains unsolved. Authorities have not provided any new leads since his disappearance, making it one of San Francisco's long-standing cold cases. Despite investigations and Gabriel's case being listed in databases like NamUs, there is little public information to explain what happened to him after he was last seen.

The San Francisco Police Department continues to encourage anyone with information to come forward, though the case remains a mystery after more than three decades. Gabriel's family and community are still searching for answers regarding his disappearance.

Last Seen: Apr 8, 1987

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.

82%Moderate
John Doe — Burlingame, California
UP9898 • Found Oct 5, 1995
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Sex ✓Male
Age 82%Est. 33–46 vs 48 when missing
Race 100%White
Location 99%15 mi away, same state
TimingFound 8 years after last seen
Height 100%5'7" vs 5'6"
Weight 100%142 lb vs 130 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Tiburon, California
UP11905 • Found Sep 29, 1993
View case
Sex ✓Male
Age 100%Est. 50–60 vs 48 when missing
Race 100%White
Location 100%7 mi away, same state
TimingFound 6 years after last seen
Height 100%5'5" vs 5'6"
Weight 100%135 lb vs 130 lb
Hair 40%Gray vs Brown
Eyes 60%Hazel vs Brown
81%Moderate
John Doe — Sausalito, California
UP11920 • Found May 7, 1994
View case
Sex ✓Male
Age 100%Est. 40–50 vs 48 when missing
Race 100%White
Location 100%7 mi away, same state
TimingFound 7 years after last seen
Height 84%5'4" vs 5'6"
Weight 65%165 lb vs 130 lb
Hair 100%Brown vs Brown
Eyes 60%Hazel vs Brown
80%Moderate
John Doe — San Jose, California
UP127124 • Found Sep 24, 1995
View case
Sex ✓Male
Age 100%Est. 48–62 vs 48 when missing
Race 100%White
Location 91%43 mi away, same state
TimingFound 8 years after last seen
Height 100%5'5"–5'8" vs 5'6"
Weight 98%116 lb vs 130 lb
Hair 100%Brown vs Brown
Eyes 0%Gray vs Brown
80%Moderate
John Doe — Palo Alto, California - unidentified case UP127061
John Doe — Palo Alto, California
UP127061 • Found May 23, 1994
View case
Sex ✓Male
Age 85%Est. 30–50 vs 48 when missing
Race 100%White
Location 95%30 mi away, same state
TimingFound 7 years after last seen
Height 100%5'7"–5'9" vs 5'6"
Weight 78%157–172 lb vs 130 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
80%Moderate
John Doe — San Jose, California
UP109342 • Found Aug 8, 1989
View case
Sex ✓Male
Age 100%Est. 48–62 vs 48 when missing
Race 100%White
Location 91%42 mi away, same state
TimingFound 2 years after last seen
Height 84%5'8" vs 5'6"
Weight 92%112 lb vs 130 lb
Hair 40%Gray vs Brown
80%Moderate
John Doe — San Francisco, California
UP5933 • Found Oct 12, 1991
View case
Sex ✓Male
Age 85%Est. 55–75 vs 48 when missing
Race 100%White
Location 100%Same area, same county
TimingFound 5 years after last seen
Height 100%5'7" vs 5'6"
Weight 92%112 lb vs 130 lb
Hair 40%Gray vs Brown
80%Moderate
John Doe — San Francisco, California
UP5925 • Found Jul 23, 1989
View case
Sex ✓Male
Age 85%Est. 40–65 vs 48 when missing
Race 100%White
Location 100%Same area, same county
TimingFound 2 years after last seen
Height 100%5'6" vs 5'6"
80%Moderate
John Doe — San Francisco, California - unidentified case UP146037
John Doe — San Francisco, California
UP146037 • Found Oct 10, 2014
View case
Sex ✓Male
Age 100%Est. 48–62 vs 48 when missing
Race 100%White
Location 100%5 mi away, same county
TimingFound 28 years after last seen
Height 100%5'5"–5'9" vs 5'6"
Weight 100%127 lb vs 130 lb
Hair 70%Gray vs Brown
79%Possible
John Doe — Millbrae, California - unidentified case UP16409
John Doe — Millbrae, California
UP16409 • Found Feb 23, 2017
View case
Sex ✓Male
Age 85%Est. 60–80 vs 48 when missing
Race 100%White
Location 99%12 mi away, same state
TimingFound 30 years after last seen
Height 100%5'7" vs 5'6"
Weight 100%120 lb vs 130 lb
Hair 70%Gray vs Brown
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.