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 (MP4421) and 4 other sources
Jasen Michael Demello, age 24, was last seen on March 1, 1996, in Bay Point, California. Standing at 6 feet tall and weighing around 185 pounds, Jasen had brown hair and green eyes. He also had distinctive features, including a tattoo of a skull and knife on his upper arm, a scar on his left cheek, and a birthmark on his abdomen.

At the time of his disappearance, Jasen may have been using the alias "Briggs" as his last name. There are very few details surrounding his case, and no significant leads have emerged since he was last seen. His case remains classified as a missing person, and investigators from the Contra Costa County Sheriff's Department continue to seek information that could shed light on his whereabouts.

Jasen's family and authorities hope that someone with knowledge of his disappearance will come forward, as his case remains unsolved after more than two decades.

Last Seen: Mar 1, 1996

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.

85%Strong
John Doe — California - unidentified case UP2363
John Doe — California
UP2363 • Found Mar 9, 2003
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Sex ✓Male
Age 100%Est. 30–45 vs 24 when missing
Race 100%White
Location 91%45 mi away, same state
TimingFound 7 years after last seen
Height 100%5'11" vs 6'0"
Hair 100%Brown vs Brown
Physical features: Tattoo: skull
81%Moderate
John Doe — Sausalito, California
UP7082 • Found Aug 21, 2007
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Sex ✓Male
Age 100%Est. 25–35 vs 24 when missing
Race 100%White
Location 94%31 mi away, same state
TimingFound 11 years after last seen
Height 84%5'10" vs 6'0"
Weight 98%160 lb vs 180 lb
Hair 100%Brown vs Brown
Eyes 70%Hazel vs Green
79%Possible
John Doe — Napa, California
UP69733 • Found Dec 14, 2007
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Sex ✓Male
Age 100%Est. 28–42 vs 24 when missing
Race 100%White
Location 96%26 mi away, same state
TimingFound 12 years after last seen
Height 100%6'0"–6'3" vs 6'0"
79%Possible
John Doe — California - unidentified case UP17689
John Doe — California
UP17689 • Found May 10, 1998
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Sex ✓Male
Age 100%Est. 20–30 vs 24 when missing
Race 100%White
Location 91%44 mi away, same state
TimingFound 2 years after last seen
Height 68%5'9" vs 6'0"
Weight 100%170 lb vs 180 lb
Hair 100%Brown vs Brown
Eyes 0%Brown vs Green
79%Possible
John Doe — Brisbane, California - unidentified case UP12987
John Doe — Brisbane, California
UP12987 • Found Sep 17, 2014
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Sex ✓Male
Age 100%Est. 20–35 vs 24 when missing
Race 100%White
Location 94%34 mi away, same state
TimingFound 19 years after last seen
Height 100%6'0" vs 6'0"
Weight 100%175 lb vs 180 lb
76%Possible
John Doe — Stockton, California - unidentified case UP50599
John Doe — Stockton, California
UP50599 • Found Jul 12, 1997
View case
Sex ✓Male
Age 100%Est. 20–30 vs 24 when missing
Race 100%White
Location 93%37 mi away, same state
TimingFound 16 months after last seen
Height 36%5'7" vs 6'0"
Weight 70%135 lb vs 180 lb
Hair 60%Black vs Brown
76%Possible
John Doe — Sausalito, California - unidentified case UP7083
John Doe — Sausalito, California
UP7083 • Found Dec 12, 2006
View case
Sex ✓Male
Age 100%Est. 17–25 vs 24 when missing
Race 100%White
Location 94%31 mi away, same state
TimingFound 11 years after last seen
Height 52%5'8" vs 6'0"
Weight 100%170 lb vs 180 lb
Hair 60%Black vs Brown
Eyes 50%Blue vs Green
76%Possible
John Doe — San Francisco, California
UP5946 • Found Jul 7, 1996
View case
Sex ✓Male
Age 51%Est. 30–50 vs 24
Race 100%White
Location 95%31 mi away, same state
TimingFound 4 months after last seen
Height 100%5'11" vs 6'0"
Weight 98%200 lb vs 180 lb
75%Possible
John Doe — Suisun City, California
UP115237 • Found Jun 28, 2023
View case
Sex ✓Male
Age 100%Est. 18–25 vs 24 when missing
Race 100%White
Location 99%15 mi away, same state
TimingFound 27 years after last seen
Height 75%5'3"–5'11" vs 6'0"
Hair 60%Black vs Brown
75%Possible
John Doe — Sausalito, California
UP12220 • Found May 15, 2013
View case
Sex ✓Male
Age 75%Est. 45–60 vs 24 when missing
Race 100%White
Location 94%31 mi away, same state
TimingFound 17 years after last seen
Height 100%6'0" vs 6'0"
Weight 100%180 lb vs 180 lb

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.