The FBI released photographs on Thursday of a person of interest in the assassination of conservative activist Charlie Kirk at Utah Valley University, as authorities continue their search for the gunman who remains at large.
The images show what authorities described as a college-aged man wearing a black long-sleeve shirt, dark pants, a dark-colored hat, and sunglasses. The suspect entered the Utah Valley University campus at 11:52 a.m., about half an hour before Kirk was shot.
Video from campus shows the shooter climbing to the roof of a building overlooking the event. The assassin jumped from the building and fled to a nearby neighborhood after the shooting.
That footage was later released by the FBI.
The FBI announced Thursday it is offering a reward of up to $100,000 for information leading to the arrest of Kirk's assassin.
A "bolt action high-powered rifle" used in the shooting has been recovered in a wooded area near campus, where the person of interest fled. It will be examined closely and analyzed, the FBI said.
Two individuals were questioned and released on Wednesday in connection with the shooting.
Kirk was taking questions from the audience when he was shot.
Former Utah Rep. Jason Chaffetz saw Kirk fall backward after hearing one shot. "As soon as I saw Charlie go back, you realize that it was a shot," Chaffetz said. "It wasn't as if there was a whole bunch of gunfire. It was one shot."
Kirk was known for conducting campus debates with college students on controversial political topics. He was speaking at what was intended to be the opening event of his "American Comeback Tour" in Orem, Utah.
The FBI is requesting anyone with information to contact 1-800-CALL-FBI and submit photos and videos to fbi.gov/utahvalleyshooting, according to the agency.