On August 1, 1966 Charles Whitman killed both his mother and his wife while they slept. He went and purchased firearms from local shops, then drove to UT Austin's central tower.
Then, as today, the tower was an administrative building and, at the time, was also the library for UT Austin. It still looms well above all other features not just on campus, but for much of the surrounding territory. From the top of the tower, one has a panoramic view in all directions, far out to the hills of West Austin, into downtown to the South if you look beyond the South Mall and the older buildings on campus that surround the grassy strip, usually strewn with students studying and socializing. To the East lies the stadium and a great swath of campus, and to the North, the science buildings, and past that, the Hyde Park neighborhood.
I went up the first time in 2000 shortly after the Tower's observation deck re-opened for the first time since a rash of suicides in the 1970's. No, Whitman's atrocity didn't convince the University that it needed to be closed.
On that morning, Whitman took a footlocker full of weapons with him to the top of the tower, and knocked an administrative assistant unconscious with his rifle (she would die later at Seton Hospital). He would show a final and baffling act of mercy as he let a couple who had not seen the secretary's unconscious form bypass him, and then he barricaded the door. Moments later he would kill and wound several tourists who came to the door seeking to go out to the Tower's observation deck.
Whitman took advantage of the unimpeded vantage provided by the 27 story tower and began firing down upon students and faculty walking between buildings. For about 100 minutes Whitman held Austin hostage between Guadalupe and the East Mall, from the North Mall to far past the South Mall, where visibility goes down to 21st Street and further down University Avenue.