The person at the center of this case
William Clayton Miller
Missing Person · Open
133 days waiting
Missing Person: William Clayton Miller
Justice for William Clayton Miller — the trail went cold in 2026, but the truth hasn't.
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Key leads to think about
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vehicle
Lead #1Why was Miller's vehicle abandoned at the Blue-Sky Ecological Preserve parking lot in Poway, and what does this location reveal about his final movements?
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contact
Lead #2What was the content and context of the final text message exchange between Miller and his estranged wife on March 2?
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witness
Lead #3Did anyone observe Miller or his vehicle at the Blue-Sky Ecological Preserve or in the surrounding area on or around March 2, 2026?
William Clayton Miller, a 59-year-old male, was last contacted via text message by his estranged wife on March 2, 2026, in Valley Center, San Diego, California. His vehicle was discovered abandoned at the Blue-Sky Ecological Preserve parking lot in Poway, raising serious concerns about his whereabouts. The San Diego County Sheriff's Office Homicide Unit is actively investigating, and anyone with information about Miller's disappearance is urged to contact authorities.
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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 #4What was the nature of Miller's estrangement from his wife, and were there any known conflicts or concerns prior to his disappearance?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
NamUs case MP159218. Missing person: William Clayton Miller.
Last known contact: 2026-03-02 in Valley Center, San Diego, CA. Circumstances: Miller was last contacted via text message by his estranged wife.
His vehicle was recovered at the parking lot to the Blue-Sky Ecological Preserve in the city of Poway. Demographics: 59 years, Male, White / Caucasian.
Physical description: 6 ft 0 in, 210 lbs, hair: Gray or Partially Gray, eyes: Brown. Clothing and accessories: Clothing: Frequently wears New Balance sneakers.
Investigating agency: San Diego County Sheriff's Office-Homicide Unit | 26110351 | 2026-03-18.
Timeline of Events
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2026-03-02
Last Contact
William Clayton Miller last contacted via text message by his estranged wife in Valley Center, San Diego, CA
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2026-03-18
Case Assigned to Homicide Unit
San Diego County Sheriff's Office Homicide Unit assigned to investigate case MP159218
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:March 2, 2026
Last Updated:June 17, 2026
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Any information, no matter how small, could be crucial to solving this case.
Phone: 8582856330
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Case Information
Incident:March 2, 2026
Last Updated:June 17, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 8582856330
You can remain anonymous