The person at the center of this case
Dean Muccillo
Missing Person · Open
225 days waiting
Missing Person: Dean Muccillo
Justice for Dean Muccillo — the trail went cold in 2026, but the truth hasn't.
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Key leads to think about
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evidence
Lead #1Where did the bicycle accident occur and which hospital, if any, treated Dean for injuries?
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location
Lead #2What shelters, encampments, or known gathering places for homeless individuals in Anaheim might Dean have frequented?
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witness
Lead #3Did anyone witness a bicycle accident involving a 57-year-old male in the Anaheim area in February 2026?
Dean Muccillo, a 57-year-old man experiencing homelessness, was last known to be in contact on January 20, 2026, in Anaheim, California. His sister reported he may have been involved in a bicycle accident around February 2026, but the location of the accident and which hospital he was taken to remain unknown. The Anaheim Police Department is investigating, and anyone with information about Dean's whereabouts or the circumstances of the accident is urged to come forward.
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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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contact
Lead #4Has Dean attempted to contact family members or accessed any services since January 2026?
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 MP159047. Missing person: Dean Muccillo.
Last known contact: 2026-01-20 in Anaheim, Orange, CA. Circumstances: Dean was last known to be experiencing homeless near Anaheim, CA.
According to his sister he was involved in a bicycle accident at an unknown location in February of 2026 at about the time he was reported missing. His sister was not sure where the accident occurred or what hospital he was taken to.
Demographics: 57 years, Male, White / Caucasian. Physical description: 5 ft 11 in, 170 lbs, hair: Brown, eyes: Brown.
Investigating agency: Anaheim Police Department | 26-23749 | 2026-02-18.
Timeline of Events
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2026-01-20
Last Known Contact
Dean Muccillo was last known to be in contact in Anaheim, California. He was experiencing homelessness at this time.
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2026-02-18
Case Reported to Police
Anaheim Police Department opened investigation case MP159047. Sister reported Dean may have been involved in a bicycle accident around February 2026.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:January 20, 2026
Last Updated:August 14, 2026
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Any information, no matter how small, could be crucial to solving this case.
Phone: 7147651900
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Case Information
Incident:January 20, 2026
Last Updated:August 14, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 7147651900
You can remain anonymous