A Los Angeles County sheriff’s deputy who the authorities say faked being shot by a sniper last week is off the force.

The deputy, Angel Reinosa, is no longer employed by the Los Angeles County Sheriff’s Department or by the county of Los Angeles, Sheriff Alex Villanueva said at a news conference on Wednesday.

“I have taken swift administrative action in the matter,” Sheriff Villanueva said, adding that by law he was unable to discuss confidential personnel matters. “And I cannot speculate why he did what he did.”

A criminal investigation into Mr. Reinosa’s actions by the Sheriff’s Department is continuing, and evidence will be presented to the district attorney’s office in the near future, the sheriff said.