Rick William Robison, 55, was arrested by Mendocino County officials after he allegedly robbed the Savings Bank of Mendocino's Hopland branch.
The Mendocino County Sheriff's Office issued a statement Wednesday in which the agency said it was continuing to investigate Robison's connection to other incidents around the county.
Robison is a suspect in other bank robberies in Mendocino, Napa and Sonoma counties, according to statements to North Coast media on Thursday.
His booking sheet, released Thursday, shows that at 5 feet 9 inches and 170 pounds, with graying hair, he matches the physical description of the suspect in those cases.
Officials had reported on a series of bank robberies in the three-county area, including the robbery of the Windsor Bank of America on March 17, the Ukiah Bank of America on March 24, the US Bank on Jefferson Street in Napa on March 26 and the Chase Bank in Willits on March 31.
The suspect in those incidents handed a note across the counter to the bank teller; in the Napa County case, the demand note was written in crayon. He was spotted leaving the Napa robbery in a white four-door Cadillac sedan. No weapons were seen in the robberies and no one was hurt.
Surveillance photos of the suspect in those cases also shows a figure who looks like Robison.
The Federal Bureau of Investigation has been working with the Ukiah Police Department and the sheriff's office of Sonoma, Mendocino and Napa counties in investigating the case.
Robison was being held on $75,000 bail for charges of robbery and using fear as an element on Thursday.
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