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 (MP29931) and 10 other sources
Louis Robert Piatt, 66 years old, was last seen on December 29, 2011, off the coast of Malibu, California. That afternoon, Piatt set off on a solo kayaking trip from Malibu Pier. Around 3:00 p.m., he called 911, reporting chest pains and heavy breathing while out in the water, but the call abruptly ended before he could provide his exact location. When rescue teams arrived, they found his overturned kayak and a life vest, but there was no sign of Piatt himself. His vehicle was discovered parked near the pier.

Despite a 23-hour search covering 110 square miles, no trace of Piatt was found. Witnesses reported seeing a large motorboat speeding away from the area just before rescue teams arrived. This led to speculation that Piatt may have either faked his death or been involved in some other suspicious circumstance. However, Piatt’s family dismissed the idea of him faking his death, pointing to his close relationship with his teenage sons and lack of prior warning signs.

Piatt, a real estate executive and former Marine, remains missing, and authorities continue to seek information about his disappearance, particularly concerning the motorboat seen near the site. His case remains unsolved, and investigators have not ruled out any possibilities.

Last Seen: Dec 29, 2011

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 — Los Angeles, California - unidentified case UP13458
John Doe — Los Angeles, California
UP13458 • Found Oct 7, 2014
View case
Sex ✓Male
Age 100%Est. 65–80 vs 66 when missing
Race 100%White
Location 100%Same area, same county
TimingFound 3 years after last seen
Height 100%5'6"–5'10" vs 5'9"
Weight 78%134 lb vs 170 lb
Hair 100%Gray vs Gray
Eyes 60%Hazel vs Brown
84%Moderate
John Doe — Buena Park, California - unidentified case UP12758
John Doe — Buena Park, California
UP12758 • Found Jul 1, 2014
View case
Sex ✓Male
Age 94%Est. 50–65 vs 66 when missing
Race 100%White
Location 98%19 mi away, same state
TimingFound 3 years after last seen
Height 84%5'11" vs 5'9"
Weight 100%183 lb vs 170 lb
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Los Angeles, California - unidentified case UP77704
John Doe — Los Angeles, California
UP77704 • Found Dec 31, 2020
View case
Sex ✓Male
Age 85%Est. 50–70 vs 66 when missing
Race 100%White
Location 100%Same area, same county
TimingFound 9 years after last seen
Height 100%5'3"–5'8" vs 5'9"
Weight 100%140–160 lb vs 170 lb
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Los Angeles, California - unidentified case UP55211
John Doe — Los Angeles, California
UP55211 • Found Jan 16, 2019
View case
Sex ✓Male
Age 94%Est. 50–65 vs 66 when missing
Race 100%White
Location 100%4 mi away, same county
TimingFound 7 years after last seen
Height 100%5'8" vs 5'9"
Weight 87%198 lb vs 170 lb
Hair 40%Brown vs Gray
Eyes 100%Brown vs Brown
82%Moderate
John Doe — California - unidentified case UP15654
John Doe — California
UP15654 • Found Jul 9, 2016
View case
Sex ✓Male
Age 85%Est. 55–75 vs 66 when missing
Race 100%White
Location 96%24 mi away, same county
TimingFound 5 years after last seen
Height 100%5'8"–6'0" vs 5'9"
Weight 86%141 lb vs 170 lb
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Long Beach, California - unidentified case UP13324
John Doe — Long Beach, California
UP13324 • Found Sep 6, 2014
View case
Sex ✓Male
Age 100%Est. 55–70 vs 66 when missing
Race 100%White
Location 97%20 mi away, same county
TimingFound 3 years after last seen
Height 68%6'0" vs 5'9"
Weight 100%187 lb vs 170 lb
Hair 100%Gray vs Gray
80%Moderate
John Doe — Los Angeles, California
UP104480 • Found Mar 22, 2023
View case
Sex ✓Male
Age 100%Est. 55–70 vs 66 when missing
Race 100%White
Location 100%2 mi away, same county
TimingFound 11 years after last seen
Height 100%5'6"–5'9" vs 5'9"
Weight 100%180–190 lb vs 170 lb
Hair 70%Brown vs Gray
Eyes 0%Blue vs Brown
80%Moderate
John Doe — Los Angeles, California - unidentified case UP78168
John Doe — Los Angeles, California
UP78168 • Found Mar 19, 2020
View case
Sex ✓Male
Age 85%Est. 45–65 vs 66 when missing
Race 100%White
Location 100%6 mi away, same county
TimingFound 8 years after last seen
Height 100%5'5"–5'10" vs 5'9"
Weight 100%140–160 lb vs 170 lb
Hair 100%Gray vs Gray
Eyes 0%Blue vs Brown
80%Moderate
John Doe — Jurupa Valley, California
UP109282 • Found Nov 1, 2019
View case
Sex ✓Male
Age 83%Est. 78–92 vs 66 when missing
Race 100%White
Location 90%47 mi away, same state
TimingFound 8 years after last seen
Height 100%5'8" vs 5'9"
Weight 82%138 lb vs 170 lb
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
79%Possible
John Doe — San Diego, California - unidentified case UP65509
John Doe — San Diego, California
UP65509 • Found Aug 1, 2019
View case
Sex ✓Male
Age 100%Est. 70–80 vs 66 when missing
Race 100%White
Location 73%111 mi away, same state
TimingFound 8 years after last seen
Height 100%5'9" vs 5'9"
Weight 78%134 lb vs 170 lb
Hair 100%Gray vs Gray
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.