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Jack Leon Cooper Missing Person Case

Last seen in Sonoma, California on Aug 23, 2001

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Victim Details

Jan 24, 2026

Jan 24, 2026

Jack

Leon Cooper

95

70

5'7 inches

165 lbs

White

Male

Aug 23, 2001

Sonoma

California

Sonoma

California State Parks Police Department

Oct 4, 2026

Case Description

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Summary based on 2 sources
Jack Leon Cooper, a 70-year-old white male, went missing on August 23, 2001, in Sonoma, California. At the time of his disappearance, he was described as being 5'7" and 165 pounds, with brown hair and brown eyes.

On the day he vanished, Cooper was fishing with friends at Salmon Creek Beach. The boat they were in capsized during the day. While his companions were rescued, Cooper disappeared and was never seen or heard from again. Investigators believe he drowned in the incident.

An obituary published in the Press Democrat stated that Jack Leon Cooper was "lost at sea" on August 23, 2001. He was an avid fisherman and golfer who belonged to the Saturday morning men's club at Oakmont. A U.S. Army veteran who served in Korea, he was survived by his wife, children, and a sister. The case is classified as lost/injured missing, and the California State Parks Police Department is the investigating agency.
Last Seen: Aug 23, 2001

Links to Additional Sources (2)

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  • Jack Leon Cooper - The Charley Project
  • 4679DMCA - Jack Leon Cooper - Doe Network

    • 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.

    75%Possible
    John Doe — Los Angeles, California - unidentified case UP3330
    John Doe — Los Angeles, California
    UP3330 • Found Feb 14, 2002
    View case
    Sex ✓Male
    Age 100%Est. 61–74 vs 70
    Race 100%White
    Location 75%Same state
    TimingFound 6 months after last seen
    Weight 87%192 lb vs 165 lb

    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)

    Jack Leon Cooper, 70, went missing on August 23, 2001, after a boat capsized while fishing with... ...Read More
    06/17/2024

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