The person at the center of this case
William Biocca
Missing Person · Open
76 years waiting · since 1950
Missing Person: William Biocca
Justice for William Biocca — the trail went cold in 1950, but the truth hasn't.
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Key leads to think about
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timeline
Lead #1What route did Biocca typically take on his morning walks, and did he deviate from it that day?
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witness
Lead #2Were there any neighbors or residents who saw Biocca leave his house or observed anything unusual on January 20, 1950?
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clue
Lead #3Why was there no search or investigation documented immediately after his disappearance?
William Biocca, a 67-year-old man, disappeared on January 20, 1950, after leaving his home in Santa Rosa, California for a morning walk and never returning. Despite the passage of over seven decades, the circumstances of his disappearance remain unknown, with no confirmed sightings or evidence of his fate. The case remains unsolved, and anyone with information about Biocca's whereabouts or what happened that day is urged to contact the Sonoma County Sheriff's Department.
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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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person
Lead #4Did Biocca have any health conditions, financial troubles, or personal conflicts that might explain his disappearance?
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Official wording
Source Narrative
NamUs case MP129354. Missing person: William Biocca.
Last known contact: 1950-01-20 in Santa Rosa, Sonoma, CA. Circumstances: Biocca was last seen on January 20, 1950, after leaving his house to take a morning walk.
Demographics: 67 years, Male, White / Caucasian. Physical description: 5 ft 10 in, 210 lbs, hair: Unknown, eyes: Unknown.
Investigating agency: Sonoma County Sheriff's Department | SD050913028 | 2005-09-13.
Timeline of Events
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1950-01-20
morningLast Seen
William Biocca left his house in Santa Rosa to take a morning walk and was never seen again.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:January 20, 1950 at Invalid Date
Last Updated:October 16, 2026
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Phone: 7075652569
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Case Information
Incident:January 20, 1950 at Invalid Date
Last Updated:October 16, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 7075652569
You can remain anonymous