Part 2/16:
Authorities describe the suspect as armed with a long rifle, and dispatch recordings indicate that he may have been wearing tactical gear including a helmet and vest. The timeline reveals the shooter arriving near campus before noon, slipping through stairwells, and climbing onto a rooftop from which he fired a single, fatal shot at 12:26 p.m., then disappeared into nearby neighborhoods. The FBI has offered a $100,000 reward for tips leading to his capture.