A TSA agent was arrested Friday at Denver International Airport, where he works, on suspicion of sexually assaulting three young girls. Matthew Paul Barnett, 33, is charged with 12 felony counts  including sexual assault on a child and sexual assault on a child as a pattern of abuse, according to the Adams County district attorney’s office. He was fired from his position at Denver International Airport after his arrest. “TSA does not tolerate illegal, unethical or immoral conduct,” the TSA said in a statement. “This individual is no longer employed by TSA.”