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 (MP41505) and 5 other sources
Alexander Lengheimer, a 53-year-old man, was last seen in San Francisco, California, on December 15, 1988. His vehicle was discovered abandoned at a beach on the Great Highway near Sloat Boulevard on December 30, 1988. Despite extensive searches, Alexander has never been located, and foul play is suspected in his disappearance. At the time of his disappearance, he was described as 5'7" tall, weighing 180 pounds, with brown hair and brown eyes.

Authorities believe that his case involves suspicious circumstances, but few additional details are available about the events leading up to his disappearance. The San Francisco Police Department continues to investigate, and anyone with information is encouraged to contact them to assist in solving this long-standing case. His case remains open, with the hope that new evidence might emerge.

For further information, you can refer to missing persons databases like NamUs and the Charley Project.

Last Seen: Dec 15, 1988

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.

81%Moderate
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Sex ✓Male
Age 100%Est. 43–55 vs 53 when missing
Race 100%White
Location 100%8 mi away, same state
TimingFound 5 years after last seen
Height 100%5'8" vs 5'7"
81%Moderate
John Doe — San Francisco, California
UP5925 • Found Jul 23, 1989
View case
Sex ✓Male
Age 85%Est. 40–65 vs 53
Race 100%White
Location 100%Same area, same county
TimingFound 7 months after last seen
Height 100%5'6" vs 5'7"
80%Moderate
John Doe — San Francisco, California
UP91361 • Found Feb 5, 2022
View case
Sex ✓Male
Age 100%Est. 60–70 vs 53 when missing
Race 100%White
Location 100%4 mi away, same county
TimingFound 33 years after last seen
Height 84%5'9" vs 5'7"
Weight 100%191 lb vs 180 lb
Hair 70%Gray vs Brown
Eyes 100%Brown vs Brown
80%Moderate
John Doe — San Jose, California
UP126945 • Found Nov 23, 1992
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Sex ✓Male
Age 85%Est. 50–70 vs 53 when missing
Race 100%White
Location 92%42 mi away, same state
TimingFound 4 years after last seen
Height 100%5'8" vs 5'7"
Weight 100%175 lb vs 180 lb
Hair 40%Gray 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 53
Race 100%White
Location 91%42 mi away, same state
TimingFound 8 months after last seen
Height 100%5'8" vs 5'7"
Weight 34%112 lb vs 180 lb
Hair 40%Gray vs Brown
80%Moderate
John Doe — Tiburon, California
UP11905 • Found Sep 29, 1993
View case
Sex ✓Male
Age 100%Est. 50–60 vs 53 when missing
Race 100%White
Location 100%7 mi away, same state
TimingFound 5 years after last seen
Height 84%5'5" vs 5'7"
Weight 70%135 lb vs 180 lb
Hair 40%Gray vs Brown
Eyes 60%Hazel vs Brown
80%Moderate
John Doe — San Francisco, California - unidentified case UP146034
John Doe — San Francisco, California
UP146034 • Found Jan 22, 2014
View case
Sex ✓Male
Age 100%Est. 68–82 vs 53 when missing
Race 100%White
Location 100%Same area, same county
TimingFound 25 years after last seen
Height 100%5'8" vs 5'7"
Weight 87%83–150 lb vs 180 lb
Hair 70%Gray vs Brown
80%Moderate
John Doe — San Francisco, California - unidentified case UP146018
John Doe — San Francisco, California
UP146018 • Found Jan 18, 2014
View case
Sex ✓Male
Age 100%Est. 48–62 vs 53 when missing
Race 100%White
Location 100%1 mi away, same county
TimingFound 25 years after last seen
Height 100%5'8" vs 5'7"
Weight 100%186 lb vs 180 lb
Hair 70%Gray vs Brown
79%Possible
John Doe — Palo Alto, California - unidentified case UP127061
John Doe — Palo Alto, California
UP127061 • Found May 23, 1994
View case
Sex ✓Male
Age 74%Est. 30–50 vs 53 when missing
Race 100%White
Location 95%30 mi away, same state
TimingFound 5 years after last seen
Height 100%5'7"–5'9" vs 5'7"
Weight 100%157–172 lb vs 180 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
79%Possible
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 53 when missing
Race 100%White
Location 100%5 mi away, same county
TimingFound 26 years after last seen
Height 100%5'5"–5'9" vs 5'7"
Weight 58%127 lb vs 180 lb
Hair 70%Gray 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.