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 became of the 44-foot sailboat S/V Ocean Bound? Has any wreckage or debris been recovered?
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person
Lead #2What were the circumstances and condition of the three sailors at the time of last contact?
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witness
Lead #3Were there any other vessels in the area that may have observed the S/V Ocean Bound or any distress signals?
Frank William O'Brien, a 55-year-old sailor, went missing on April 4, 2023, while aboard the 44-foot sailboat S/V Ocean Bound with his wife Kerry and fellow sailor William Gross, last heard from near Mazatlán, Mexico while en route to San Diego. Extensive search efforts in the area failed to locate the vessel or any of the three people aboard. The circumstances of their disappearance remain unknown, and the case seeks any information about the boat'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.
🔍
evidence
Lead #4Have any distress calls, emergency beacons, or communications from the boat been documented?
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Even the smallest detail could be the key to solving this case.
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
Frank O'Brien, his wife Kerry, and sailor William Gross were last heard from aboard the 44-foot S/V Ocean Bound near Mazatlán, Mexico while sailing toward San Diego.
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2023-04-04
Disappearance
Three people and the sailboat S/V Ocean Bound disappeared while en route from Mazatlán, Mexico to San Diego.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:April 4, 2023
Last Updated:July 29, 2026
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Any information, no matter how small, could be crucial to solving this case.
Phone: 9077868900
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Case Information
Incident:April 4, 2023
Last Updated:July 29, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9077868900
You can remain anonymous