For some people, the attack on police officers by a gunman in Dallas this summer brought to mind another attack by a sniper in Austin 50 years ago – on Aug. 1, 1966. That's when student Charles Whitman stuck his rifle over the edge of the clock tower at the University of Texas and started shooting. Ultimately, he killed 16 people — and wounded more than 30 others.
For decades, people have struggled to figure out why. There have been theories about abuse, a brain tumor and, of course, mental illness.