Article continues below advertisementCole Allen, the man who was arrested for attempting to assassinate Donald Trump at the White House Correspondents' dinner on April 25, has been indicted on four criminal counts by a grand jury.The 31-year-old teacher's four felony counts include: attempt to assassinate the President of the United States, assaulting an officer of the United States with a deadly weapon, transportation of a firearm and discharging a firearm during a crime of violence.If he's convicted, he could face life in prison.