The FBI said it is offering a reward of up to $100,000 for information that leads law enforcement to identify and arrest the person or people involved in Kirk’s assassination.

Utah Public Safety Commissioner Beau Mason said the suspect was a male who “blended in” with the college community and appears to be “college-age.”

Mason said investigators have been able to track the shooter’s movements before and after the assassination. He said the gunman is believed to have arrived on campus at 11:52 a.m. local time Wednesday and moved through stairwells to the roof of a building near where Kirk’s event was taking place, which was the shooting location.

Mason said the shooter moved to the other side of the building after firing a single shot, then jumped off and fled into a neighborhood off campus. Investigators contacted homeowners with cameras, and witnesses