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Derrick Kwan Missing Person Case

Last seen in Crestline, California on Mar 27, 2022

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Victim Details

Apr 1, 2022

Jul 18, 2024

Derrick

Kwan

31

27

68 inches

165 lbs

Asian

Male

Mar 27, 2022

Crestline

California

San Bernardino County

No

149446

San Bernardino Police Department

San Bernardino

California

San Bernardino County

92401

710 North D Street, California

9093845742

Local

Law Enforcement

http://www.ci.san-bernardino.ca.us/cityhall/police_department/default.asp

2022-00035607

San Bernardino Police Department

4245

Black

Brown

Brown

Oct 12, 2026


Area Last Seen:

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Search continues for missing Diamond Bar man Derrick Kwan ...

Case Description

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Summary based on the NamUs case record (MP90181) and 8 other sources
Derrick Aidan Kwan, a 27-year-old man, went missing on March 27, 2022, after leaving his family’s home in Diamond Bar, California, to go hiking in the Lake Arrowhead area. He was last seen around 11 a.m. that day, wearing a black t-shirt and shorts. Later, his silver Toyota was discovered abandoned near Highway 138 and Crestline, having sustained minor damage from a collision with a guardrail. Witnesses reported seeing a man matching Kwan’s description running from the crash site toward the nearby woods, carrying two large bags.

Derrick was an experienced hiker but had been struggling with mental health issues leading up to his disappearance. Despite extensive searches by his family, friends, and authorities, no significant clues have surfaced regarding his whereabouts. His family does not believe he disappeared voluntarily, and the case remains unsolved.
Last Seen: Mar 27, 2022

Links to Additional Sources (8)

See any mistakes? Let us know!
  • Family, friends search for man missing in San Bernardino Mountains ...
  • Diamond Bar man's disappearance takes searchers to San ...
  • Search continues for missing Diamond Bar man Derrick Kwan
  • Diamond Bar Man Missing After Crash on Mountain Road
  • Derrick Aidan Kwan | State of California - Department of Justice
  • missing persons – Page 7 – San Gabriel Valley Tribune
  • Search continues for missing Diamond Bar man Derrick Kwan - Reddit
  • Derrick Aidan Kwan - The Charley Project

    • Possible Unidentified Matches (1)

    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.

    78%Possible
    John Doe — Riverside, California - unidentified case UP118444
    John Doe — Riverside, California
    UP118444 • Found Aug 18, 2022
    View case
    Sex ✓Male
    Age 94%Est. 28–42 vs 27
    Location 96%26 mi away, same state
    TimingFound 5 months after last seen
    Height 100%5'8" vs 5'8"
    Weight 80%198 lb vs 165 lb
    Hair 40%Gray vs Black
    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.

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    Forum Posts (1)

    Derrick Aidan Kwan, 27, disappeared after leaving his family’s home in Diamond Bar, California, on... ...Read More
    04/25/2024

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