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 (MP24790) and 2 other sources
Richard Marion Rideout, a 50-year-old man, was last seen on August 25, 1984, in Long Beach, California. At the time of his disappearance, Rideout was described as a Caucasian male, standing 5'11" tall and weighing around 150 pounds, with black hair. The details surrounding his disappearance remain unclear, and no substantial leads have emerged to explain what happened to him.

Despite efforts from authorities and missing person databases, his case remains unsolved decades later. His disappearance has been registered with NamUs, and investigators continue to seek any information that might help solve the mystery. Rideout's case is part of many cold cases that still need attention and potential public input.

Anyone with knowledge about the circumstances of Rideout's disappearance is encouraged to provide information to authorities, as even small details could be critical in shedding light on this long-standing case.

Last Seen: Aug 25, 1984

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
John Doe — Los Angeles, California
UP3944 • Found Oct 16, 1989
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Sex ✓Male
Age 100%Est. 49–54 vs 50 when missing
Race 100%White
Location 98%19 mi away, same county
TimingFound 5 years after last seen
Height 100%5'11" vs 5'11"
Weight 100%156 lb vs 150 lb
Hair 60%Brown vs Black
Eyes 100%Hazel vs Hazel
84%Moderate
John Doe — Upland, California
UP2574 • Found Mar 11, 1988
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Sex ✓Male
Age 100%Est. 50–60 vs 50 when missing
Race 100%White
Location 92%39 mi away, same state
TimingFound 4 years after last seen
Height 100%5'10" vs 5'11"
Weight 100%142 lb vs 150 lb
Hair 60%Brown vs Black
Eyes 100%Hazel vs Hazel
83%Moderate
John Doe — California
UP4112 • Found Sep 23, 1987
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Sex ✓Male
Age 100%Est. 40–50 vs 50 when missing
Race 100%White
Location 97%20 mi away, same county
TimingFound 3 years after last seen
Height 100%5'10" vs 5'11"
Weight 100%140 lb vs 150 lb
83%Moderate
John Doe — South Gate, California
UP4158 • Found Aug 11, 1986
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Sex ✓Male
Age 85%Est. 40–60 vs 50 when missing
Race 100%White
Location 99%13 mi away, same county
TimingFound 24 months after last seen
Height 100%5'10" vs 5'11"
Weight 100%135 lb vs 150 lb
Hair 100%Black vs Black
83%Moderate
John Doe — Los Angeles, California
UP4173 • Found Apr 19, 1986
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Sex ✓Male
Age 100%Est. 45–58 vs 50 when missing
Race 100%White
Location 97%20 mi away, same county
TimingFound 20 months after last seen
Height 100%6'0" vs 5'11"
Weight 100%165 lb vs 150 lb
Hair 40%Gray vs Black
Eyes 30%Blue vs Hazel
81%Moderate
John Doe — Los Angeles, California - unidentified case UP13458
John Doe — Los Angeles, California
UP13458 • Found Oct 7, 2014
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Sex ✓Male
Age 100%Est. 65–80 vs 50 when missing
Race 100%White
Location 97%20 mi away, same county
TimingFound 30 years after last seen
Height 100%5'6"–5'10" vs 5'11"
Weight 99%134 lb vs 150 lb
Hair 70%Gray vs Black
Eyes 100%Hazel vs Hazel
81%Moderate
John Doe — Los Angeles, California
UP3495 • Found Sep 23, 1996
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Sex ✓Male
Age 100%Est. 42–52 vs 50 when missing
Race 100%White
Location 98%17 mi away, same county
TimingFound 12 years after last seen
Height 100%5'10" vs 5'11"
Weight 87%175 lb vs 150 lb
Hair 60%Brown vs Black
Eyes 60%Brown vs Hazel
81%Moderate
John Doe — Venice, California - unidentified case UP3627
John Doe — Venice, California
UP3627 • Found Dec 25, 1994
View case
Sex ✓Male
Age 100%Est. 60–70 vs 50 when missing
Race 100%White
Location 97%22 mi away, same county
TimingFound 10 years after last seen
Height 84%5'9" vs 5'11"
Weight 87%175 lb vs 150 lb
Hair 70%Gray vs Black
Eyes 100%Hazel vs Hazel
81%Moderate
John Doe — California
UP3998 • Found Feb 5, 1989
View case
Sex ✓Male
Age 100%Est. 50 vs 50 when missing
Race 100%White
Location 97%20 mi away, same county
TimingFound 4 years after last seen
Height 100%5'10" vs 5'11"
81%Moderate
John Doe — Glendale, California
UP4099 • Found Jan 20, 1988
View case
Sex ✓Male
Age 100%Est. 45–55 vs 50 when missing
Race 100%White
Location 96%25 mi away, same county
TimingFound 3 years after last seen
Height 68%5'8" vs 5'11"
Weight 100%138 lb vs 150 lb
Hair 40%Gray vs Black
Eyes 100%Hazel vs Hazel

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.