The FBI will not pursue charges against a federal immigration agent who fatally shot a co-worker in Southern California in early 2012, reports the Los Angeles Times .
The unidentified U.S. Immigration and Customs Enforcement agent shot Ezequiel Garcia on Feb. 16, after Garcia shot and wounded his supervisor, Kevin Kozak, during his performance review . Garcia opened fire after Kozak informed him a transfer request had been denied, reports the Associated Press .