The person at the center of this case
Kerry Lyn O'Brien
Missing Person · Open
3 years waiting · since 2023
Missing Person: Kerry Lyn O'Brien
Justice for Kerry Lyn 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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person
Lead #1What happened to the other two people aboard—Frank O'Brien (Kerry's husband) and William Gross—and were they lost together?
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vehicle
Lead #2What was the condition and seaworthiness of the S/V Ocean Bound, and could mechanical failure or weather have caused the disappearance?
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location
Lead #3Why were extensive searches near Mazatlan unsuccessful, and have drift patterns or ocean currents been analyzed to predict where the vessel might have gone?
Kerry Lyn O'Brien, a 52-year-old woman, disappeared on April 4, 2023, while sailing aboard the 44-foot S/V Ocean Bound with her husband Frank and sailor William Gross near Mazatlan, Mexico, en route to San Diego. The vessel and all three people aboard have never been located despite extensive search efforts in the area. The circumstances of their disappearance—whether due to accident, mechanical failure, or other causes—remain unknown and the case remains open.
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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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evidence
Lead #4Were there any distress signals, emergency beacons, or communications attempts made by the crew before they went missing?
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Official wording
Source Narrative
NamUs case MP103572. Missing person: Kerry Lyn O'Brien.
Last known contact: 2023-04-04 in San Diego, San Diego, CA. Circumstances: Kerry and her husband Frank 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: 52 years, Female, White / Caucasian. Physical description: 5 ft 3 in, 130 lbs, hair: Blond/Strawberry, eyes: Hazel.
Investigating agency: Anchorage Police Department | 230013486.
Timeline of Events
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2023-04-04
Last Contact with S/V Ocean Bound
Kerry Lyn O'Brien, her husband Frank O'Brien, and sailor William Gross were last heard from aboard the 44-foot sailboat S/V Ocean Bound near Mazatlan, Mexico while 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 26, 2026
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Phone: 9077868900
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Case Information
Incident:April 4, 2023
Last Updated:May 26, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9077868900
You can remain anonymous