Luna, who remains out of custody on a $250,000 bond, is charged with one felony count of possession of an assault weapon, which is illegal to possess in California.
Court papers allege that Luna, a former Cathedral City police officer, was an adherent to the QAnon conspiracy theory and a right-wing militia group involved in storming the U.S. Capitol on Jan. 6.
John Candias, a Rialto Police Department detective and member of the task force, wrote in a declaration in support of arrest warrant that a search of the defendant's home yielded an unregistered Smith and Wesson assault rifle under his bed.