Evan Sernoffsky, SF Gate, May 25, 2017

A 28-year-old former East Bay community college professor was arrested for a brutal bike-lock attack amid a clash between President Trump supporters and radical left demonstrators last month in Berkeley, officials said Thursday.

Video of the April 15 assault exploded on right-wing websites in the days following the clash as scores of cybersleuths began identifying Eric Clanton as the masked man seen bashing a Trump backer in the head, causing serious bleeding.

Clanton was arrested early Wednesday morning in Oakland and booked in the Berkeley Jail on suspicion of assault with a deadly weapon that is not a firearm. He is being held on $200,000 bond and is due in court at 9 a.m. Friday.

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Video of the attack on YouTube shows a masked assailant in a black hoodie emerge from a group of protesters and clobber an unwitting man in the head. {snip}

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Clanton was listed in 2016 as an adjunct professor at Diablo Valley College in Pleasant Hill, where he taught philosophy. School officials said in a statement on Facebook that Clanton is not “a current employee of the Contra Costa Community College District.”