The person at the center of this case
Frank William O'Brien
Missing Person · Open
3 years waiting · since 2023
Missing Person: Frank William O'Brien
Justice for Frank William O'Brien — the trail went cold in 2023, but the truth hasn't.
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Key leads to think about
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vehicle
Lead #1What happened to the 44-foot sailing vessel S/V Ocean Bound and its three occupants after April 4, 2023?
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person
Lead #2Were there any distress signals or communications from the vessel before it disappeared?
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evidence
Lead #3Have any debris, wreckage, or personal items from the S/V Ocean Bound been recovered in the search area?
Frank William O'Brien, a 55-year-old sailor, disappeared on April 4, 2023, while sailing the 44-foot vessel S/V Ocean Bound with his wife Kerry and fellow sailor William Gross near Mazatlan, Mexico, en route to San Diego. The trio and their boat vanished without a trace despite extensive search efforts in the area. The circumstances of their disappearance remain unknown, and the case seeks any information about the vessel's location or the fate of those aboard.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
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witness
Lead #4Did any other vessels or coastal observers report sightings of the S/V Ocean Bound near Mazatlan on or after April 4, 2023?
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Official wording
Source Narrative
NamUs case MP103573. Missing person: Frank William O'Brien.
Last known contact: 2023-04-04 in San Diego, San Diego, CA. Circumstances: Frank and his wife Kerry and another sailor, William Gross, were sailing aboard the 44-foot S/V Ocean Bound.
They were last heard from on 04/04/23 near Mazatlan, Mexico enroute to San Diego. Extensive searches of the area were unsuccessful in locating them or the boat.
Demographics: 55 years, Male, White / Caucasian. Physical description: 5 ft 8 in, 170 lbs, hair: Blond/Strawberry, eyes: Blue.
Investigating agency: Anchorage Police Department | 230013487.
Timeline of Events
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2023-04-04
Last Contact with S/V Ocean Bound
Frank O'Brien, his wife Kerry, and sailor William Gross were last heard from while sailing the 44-foot S/V Ocean Bound near Mazatlan, Mexico, en route to San Diego, California.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:April 4, 2023
Last Updated:May 21, 2026
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Phone: 9077868900
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Case Information
Incident:April 4, 2023
Last Updated:May 21, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9077868900
You can remain anonymous