A Mendocino man was arrested after a standoff with law enforcement. Riordan W. Willhelmi, 41, reportedly attacked and threatened his ex-girlfriend with a firearm last Thursday. He then barricaded himself in a residence in the 12K block of Alderwood Road. The Mendocino County Sheriff’s SWAT team was called in and Willhelmi responded to instructions and exited the building. He was booked into the Mendocino County Jail on a number of charges, including probation violations.