Federal prosecutors on Tuesday announced charges against the person accused of backing a U-Haul truck toward a blockade of U.S. Coast Guard officers in Alameda, leading them to open fire , after protests over what was expected to be a major immigration enforcement escalation in the Bay Area last month.

Brendan Munro Thompson, 26, who goes by Bella, is charged with assaulting federal officers with a deadly or dangerous weapon by reversing the truck onto the bridge that leads to the island Coast Guard base around 10 p.m. Oct. 23.

Authorities said she accelerated toward the line of officers and law enforcement vehicles shutting off access to the island, which is usually closed to the public. The erratic movement caused officers “to fear the possibility that the truck would strike them or

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