Public’s help sought for missing Antioch man
By Lt. Michael Mellone, Antioch Police Department
The Antioch Police Department is asking for the public’s help finding Stephen Simmons, a 33-year-old Antioch man who has a developmental disability and cannot care for himself. Simmons is described as a Black male, 5 feet 6 inches tall, weighing 110 pounds. He was last seen wearing a zip-up jacket and pants.
Simmons was last seen leaving his home in Antioch with a family member on Wednesday, October 14, 2026, at approximately 8:20 p.m. The family member was later located safe in Antioch. The car they were believed to be traveling in was found unoccupied early Friday morning, October 16, on Brannan Street near 7th Street in San Francisco.
Simmons’s current location is unknown. He could be in Antioch, San Francisco, or anywhere in between. The Antioch Police Department is working with the San Francisco Police Department on the search.
Simmons is very soft-spoken and has limited speech. He may not respond to his name or be able to ask for help. Anyone who sees him should approach calmly, stay with him if it is safe to do so, and call 911 right away.
Anyone with information about where Simmons may be, or who saw him at any time since Wednesday night, is asked to contact the Antioch Police Department at (925) 778-2441 and reference case number 26-9954.
Description:
• Black male, 33 years old
• 5’6″, about 110 lbs, very thin build
• Last seen wearing a zip-up jacket and pants
If you have seen Stephen anywhere since Wednesday night, please contact us.
Call 911 if you see him.
Information: Antioch PD (925) 778-2441
Case #26-9954
the attachments to this post:
Missing At-Risk Adult 10-16-26
