In a significant breakthrough for Marin County law enforcement, two individuals suspected of participating in a sophisticated multi-state burglary operation have been arrested following a Mill Valley medical office theft.
The arrests, which took place on April 30, 2025, have revealed the existence of a nationwide criminal network that has been targeting businesses across several states, using a calculated approach to steal financial information and make fraudulent purchases.
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Sophisticated Theft Ring Uncovered in Mill Valley
The investigation began after a December incident at a medical office in Mill Valley, where a man posing as a patient managed to steal bank cards from unsuspecting physical therapists.
Marin County Sheriff’s Office identified Adrian Thompson, 43, of Sacramento as the primary suspect in this carefully orchestrated theft.
“This wasn’t a simple smash-and-grab operation,” explained a law enforcement source familiar with the case.
“The suspect presented himself as a legitimate patient seeking treatment for a knee injury, gaining access to areas where staff kept their personal belongings.”
The Mill Valley Connection
After Thompson’s visit to the Mill Valley medical facility, staff members discovered their bank cards were missing and reported unauthorized charges appearing on their accounts.
This pattern of theft led investigators to connect Thompson to similar incidents across the region, from Sausalito to San Rafael, and eventually to crimes in multiple states.
Thompson was apprehended in Oakland and is now facing charges related to the Mill Valley burglary.
Additionally, he was wanted on a $200,000 burglary warrant from Washington state, indicating the extensive nature of his alleged criminal activities.
Multi-State Criminal Enterprise
Law enforcement officials have identified Thompson as part of a sophisticated burglary crew with operations spanning from Corte Madera to communities across Texas, South Carolina, and Washington.
His alleged accomplice, Riana Buffin, 28, of Oakland, was also arrested on a $150,000 theft warrant from Washington state.
The investigation has revealed a consistent method of operation:
Impact on Marin Communities
The arrests have raised concerns among business owners in Tiburon, Novato, and other Marin communities about security during business hours.
In Fairfax and San Anselmo, several small businesses have already begun implementing enhanced security measures to protect both staff and customers.
“We’re reviewing our protocols for where staff keep personal belongings,” said one Larkspur business owner who asked to remain anonymous.
“It’s disturbing that these thieves are so bold as to commit these crimes during regular business hours.”
Ongoing Investigation
Both suspects have been booked into Marin County jail. Authorities from multiple jurisdictions continue investigating the full extent of their alleged criminal network.
Law enforcement officials believe the Mill Valley incident may represent just one small piece of a much larger operation.
The Marin County Sheriff’s Office is working with law enforcement agencies in Washington, Texas, and South Carolina to determine if additional suspects may be involved. They are also considering if more charges are warranted.
Business owners throughout Belvedere, Bolinas, and other Marin communities are encouraged to report any suspicious behavior that matches this operation’s methodology.
Here is the source article for this story: Pair arrested in Mill Valley burglary suspected of belonging to crime ring
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