Update 3/30 — The Mendocino County Sheriff’s Office has begun the search for Riley Hsieh for a second day, with 41 local and regional searchers in the Brooktrails area, according to an update on social media. The Sheriff’s Office is continuing to ask from help from the public in locating Hsieh, especially from Brooktrails residents with exterior facing security cameras (details in original article.)
Participants in the search include representatives of “Mendocino County Sheriff’s Office, Mendocino County Search & Rescue Team, Marin County Search & Rescue Team, San Mateo Sheriff’s Office, Bay Area Mountain Rescue Unit (BAMRU), Napa County Search & Rescue Team, Lake County Sheriff’s Office, Lake County Search & Rescue Team, Sonoma County Sheriff’s Office, Sonoma County Search & Rescue Team, California Rescue Dog Association (CARDA) and the California Explorer Search & Rescue Team (Cal-ESAR).”
WILLITS, 3/29/23 — The Mendocino County Sheriff’s Office (MCSO) is asking for the public’s assistance in locating a man missing from Brooktrails near Willits since the morning of Monday, March 27, when he was last seen. Riley Hsieh is described as a 24 year old Asian American adult, approximately 5 feet and 10 inches tall and weighing 130 pounds, who was last seen wearing a grey robe, blue pants, and carrying a light green or blue bag in the Brooktrails area. A photo and additional details are included in the flyer below.
Mendocino County’s search and rescue team conducted a search in Brooktrails this morning, and the search efforts are ongoing. Riley may have been seen in the vicinity of the Brooktrails airport, as well as near his home on the 26000 block of Hawk Terrace. He last spoke to his family on the evening of Sunday, March 26, and was seen on his home security camera on Monday morning, and “is considered to be at risk due to the circumstances of his disappearance.”
From the Sheriff’s Office:
“The Sheriff’s Office is asking the public who lives in the Brooktrails Subdivision to check their exterior facing security cameras from Monday (03-27-23) at 11:15 AM to date in an attempt to locate any footage of Riley.
Please call the Sheriff’s Office 24-hour dispatch center at 707-463-4086 if you have any footage of Riley. This will help searchers to be more efficient and effective in their search efforts.”

I have seen him in San Francisco.
He’s ok. I don’t know why there are urgent missing person flyers in San Francisco.
Hey where in SF might you have seen Riley? There are still missing person fliers as his family and friends haven’t heard from him in over 2 months. We are deeply worried as he left during a mental health crisis! Riley is loved by his friends and we’d like to make sure he is okay.
I hope you can find it in your heart to get back to us