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Frank OBrien Missing Person Case

Last seen in San Diego, California on Apr 4, 2023

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Victim Details

May 17, 2023

Mar 5, 2024

Frank

OBrien

58

55

68 inches

170 lbs

White / Caucasian

Male

Apr 4, 2023

San Diego

California

San Diego County

No

125311

Anchorage Police Department

Anchorage

Alaska

Anchorage Borough

99501

716 West 4th Avenue, Alaska

9077868900

Local

Law Enforcement

https://www.muni.org/Departments/police/Pages/default.aspx

230013487

Anchorage Police Department

2018

Blond/Strawberry

Blue

Blue

No

Oct 5, 2026


Area Last Seen:

Case Description

Any updates on this case? Let us know!
Summary based on the NamUs case record (MP103573) and 9 other sources
Frank O'Brien, 55, was last seen on April 4, 2023, while sailing from Mazatlán, Mexico, to San Diego, California, aboard the *Ocean Bound*, a 44-foot vessel. He was traveling with his wife, Kerry O'Brien, and their friend, William Gross. The group planned to stop in Cabo San Lucas on April 6, but there was no record of them arriving. Despite extensive search efforts by the U.S. Coast Guard and Mexican Navy, no trace of the boat or its passengers has been found, and their fate remains unknown.
Last Seen: Apr 4, 2023

Links to Additional Sources (9)

See any mistakes? Let us know!
  • Three missing sailors likely encountered 20-foot seas near Mexico
  • Went out doing what he loved - Sailing Scuttlebutt
  • Family Holds Hope 3 Missing American Sailors Will be Found
  • 3 Americans Sailing to San Diego from Mexico Reported Missing
  • 3 American sailors en route to San Diego reported missing
  • Loved ones hold out hope for 3 American sailors missing for nearly ...
  • Search suspended for 3 missing American sailors off Mexico
  • 2 Alaskans among those missing after sailboat disappears off ...
  • Girdwood couple and friend missing on Mexico-to-San Diego ...

    • Possible Unidentified Matches (4)

    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 — San Diego, California - unidentified case UP133256
    John Doe — San Diego, California
    UP133256 • Found Nov 3, 2024
    View case
    Sex ✓Male
    Age 100%Est. 50–60 vs 55 when missing
    Race 100%White
    Location 100%2 mi away, same county
    TimingFound 19 months after last seen
    Height 100%5'9" vs 5'8"
    Weight 72%129 lb vs 170 lb
    Hair 50%Brown vs Blond
    Eyes 100%Blue vs Blue
    81%Moderate
    John Doe — Los Angeles, California
    UP104480 • Found Mar 22, 2023
    View case
    Sex ✓Male
    Age 100%Est. 55–70 vs 55
    Race 100%White
    Location 73%112 mi away, same state
    TimingFound same day as last seen
    Height 100%5'6"–5'9" vs 5'8"
    Weight 100%180–190 lb vs 170 lb
    Hair 50%Brown vs Blond
    Eyes 100%Blue vs Blue
    80%Moderate
    John Doe — San Diego, California - unidentified case UP122559
    John Doe — San Diego, California
    UP122559 • Found May 13, 2024
    View case
    Sex ✓Male
    Age 78%Est. 60–65 vs 55 when missing
    Race 100%White
    Location 100%Same area, same county
    TimingFound 13 months after last seen
    Height 100%5'8" vs 5'8"
    Weight 84%139 lb vs 170 lb
    Hair 50%Brown vs Blond
    Eyes 30%Hazel vs Blue
    77%Possible
    John Doe — San Diego, California
    UP110722 • Found Aug 19, 2023
    View case
    Sex ✓Male
    Age 61%Est. 40–50 vs 55
    Race 100%White
    Location 100%8 mi away, same county
    TimingFound 5 months after last seen
    Height 100%5'8"–5'9" vs 5'8"

    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)

    Frank O’Brien, 55, was last seen on April 4, 2023, aboard the 44-foot vessel Ocean Bound while... ...Read More
    05/07/2024

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