Law enforcement has obtained video footage of the person suspected of shooting and killing conservative commentator Charlie Kirk, tracked his movements leading up to and immediately following the assassination, and obtained what they believe was the murder weapon, a bolt-action rifle, authorities announced Thursday morning. Investigators have determined that the suspect, who "appears to be of college age," arrived near Utah Valley University at 11:52 a.m. and tracked him through campus, up stairwells, and onto and across the roof "to a shooting location," Utah Department of Public Safety Commissioner Beau Mason said. "After the shooting, we were able to track...