Law enforcement is seen investigating the residence of the Utah man arrested in the killing of conservative activist Charlie Kirk during an event on a college campus.

A court affidavit says Tyler Robinson, 22, was arrested on suspicion of aggravated murder, felony discharge of a firearm causing serious bodily harm, and obstruction of justice.

He is currently being held without bail at the Utah county jail, with formal charges expected early next week.

Utah Gov. Spencer Cox said Robinson had become “more political” recently and had indicated to a family friend afterwards that he was responsible for the assassination.

Cox cited as evidence the engravings on bullets found in a rifle, and chatting app messages that a roommate shared with law enforcement.

Kirk, the CEO and co-founder of the conservative youth organization Turning Point USA, was a top podcaster, culture warrior and ally of President Donald Trump.

He led an effort to remake the GOP’s get-out-the-vote effort in the 2024 election based on the theory there were thousands of Trump supporters who rarely vote but could be persuaded to do so.

His killing was the latest in a string of attacks on U.S. politicians that have targeted members of both major parties.

AP video by Ty O'Neil