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 (MP17783) and 6 other sources
Sylvia Helen Carlson, a 39-year-old woman from Santa Monica, California, went missing on December 12, 1977. She was last seen driving her brown two-door 1977 Ford Thunderbird, which was later discovered abandoned on January 4, 1978, parked on Penmar Avenue in Venice, California. Witnesses reported that the vehicle had been at that location since mid-December. Sylvia was described as 5'6", weighing about 130 pounds, with blonde hair and blue eyes. She had distinctive scars on her back and side and a previous fracture in her left wrist, which had been surgically repaired with a pin.

On the day of her disappearance, Sylvia was wearing a red dress, a maroon sweater, brown sandals, and possibly a few silver rings. Despite the discovery of her car, there were no other significant clues found, and her case remains unsolved. Investigators have limited information about the circumstances surrounding her disappearance, and no suspects have been publicly identified. Sylvia’s case is still classified as endangered missing, and despite extensive searches, no further evidence has surfaced regarding her whereabouts.

Her disappearance remains a cold case, and authorities are still seeking any information that could provide answers.

Last Seen: Dec 12, 1977

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
Jane Doe — Calabasas Highlands, California
UP4424 • Found Sep 3, 1978
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Sex ✓Female
Age 100%Est. 25–40 vs 39
Race 100%White
Location 100%10 mi away, same county
TimingFound 9 months after last seen
Height 100%5'5" vs 5'6"
Weight 74%100 lb vs 130 lb
Hair 50%Brown vs Blond
82%Moderate
Jane Doe — Los Angeles, California - unidentified case UP4332
Jane Doe — Los Angeles, California
UP4332 • Found Aug 21, 1981
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Sex ✓Female
Age 85%Est. 30–50 vs 39 when missing
Race 100%White
Location 99%15 mi away, same county
TimingFound 4 years after last seen
Height 100%5'1"–5'6" vs 5'6"
Weight 80%104 lb vs 130 lb
Hair 50%Brown vs Blond
Eyes 100%Blue vs Blue
80%Moderate
Jane Doe — Los Angeles, California - unidentified case UP80466
Jane Doe — Los Angeles, California
UP80466 • Found Apr 26, 2021
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Sex ✓Female
Age 100%Est. 50–60 vs 39 when missing
Race 100%White
Location 99%15 mi away, same county
TimingFound 43 years after last seen
Height 100%5'3"–5'6" vs 5'6"
Weight 100%115–130 lb vs 130 lb
Hair 50%Brown vs Blond
Eyes 100%Blue vs Blue
79%Possible
Jane Doe — Santa Ana, California - unidentified case UP7687
Jane Doe — Santa Ana, California
UP7687 • Found Aug 23, 1998
View case
Sex ✓Female
Age 100%Est. 45–60 vs 39 when missing
Race 100%White
Location 92%39 mi away, same state
TimingFound 21 years after last seen
Height 100%5'6" vs 5'6"
Weight 69%97 lb vs 130 lb
Hair 70%Gray vs Blond
Eyes 100%Blue vs Blue
79%Possible
Jane Doe — Los Angeles, California
UP4396 • Found Oct 7, 1979
View case
Sex ✓Female
Age 85%Est. 40–60 vs 39 when missing
Race 100%White
Location 99%15 mi away, same county
TimingFound 22 months after last seen
Height 100%5'5" vs 5'6"
Weight 72%99 lb vs 130 lb
Hair 40%Gray vs Blond
Eyes 0%Brown vs Blue
78%Possible
Jane Doe — Los Angeles, California - unidentified case UP89347
Jane Doe — Los Angeles, California
UP89347 • Found Jan 16, 2022
View case
Sex ✓Female
Age 100%Est. 40–55 vs 39 when missing
Race 100%White
Location 97%20 mi away, same county
TimingFound 44 years after last seen
Height 100%5'7"–5'9" vs 5'6"
Weight 100%110–120 lb vs 130 lb
Hair 50%Brown vs Blond
Eyes 50%Green vs Blue
78%Possible
Jane Doe — Los Angeles, California - unidentified case UP8269
Jane Doe — Los Angeles, California
UP8269 • Found Sep 10, 2010
View case
Sex ✓Female
Age 100%Est. 60–70 vs 39 when missing
Race 100%White
Location 99%15 mi away, same county
TimingFound 33 years after last seen
Height 100%5'5" vs 5'6"
Weight 71%98 lb vs 130 lb
Hair 50%Brown vs Blond
78%Possible
Jane Doe — California - unidentified case UP3496
Jane Doe — California
UP3496 • Found Aug 11, 1996
View case
Sex ✓Female
Age 100%Est. 45–60 vs 39 when missing
Race 100%White
Location 99%15 mi away, same county
TimingFound 19 years after last seen
Height 68%4'11"–5'3" vs 5'6"
Weight 100%118 lb vs 130 lb
Hair 50%Brown vs Blond
Eyes 100%Blue vs Blue
78%Possible
Jane Doe — California
UP4425 • Found Aug 13, 1978
View case
Sex ✓Female
Age 100%Est. 30–45 vs 39
Race 100%White
Location 99%15 mi away, same county
TimingFound 8 months after last seen
Height 52%5'2" vs 5'6"
Weight 43%85 lb vs 130 lb
Hair 50%Brown vs Blond
77%Possible
Jane Doe — Arleta, California - unidentified case UP104482
Jane Doe — Arleta, California
UP104482 • Found Apr 11, 2023
View case
Sex ✓Female
Age 100%Est. 35–50 vs 39 when missing
Race 100%White
Location 99%15 mi away, same county
TimingFound 45 years after last seen
Height 100%5'2"–5'5" vs 5'6"
Weight 100%125–145 lb vs 130 lb
Hair 50%Brown vs Blond
Eyes 0%Brown vs Blue

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.