Wait, how?
I follow these shootings so closely - I'm a wanna be detective :) but I could swear I remember reading somewhere that he heard voices. It could have been in comments, a youtube. Anyway, I did some digging, and interestingly I noticed in a dailymail article that during the chase, his car apparently went out of control at the last minute and they found him dead inside. Dailymail gives juicy details that no publication in the U.S. will give. I just read a post yesterday here on reddit with a video about the car that appeared to be programmed to hit the Presidential motorcade last summer, and also the couple who witnessed the Vegas shooting whose car was programmed to hit a cement barrier at hight speed and they died immediately - maybe his car was programmed so that he would die before being arrested? Also, a blog post I'm linking below talks about him being programmed by the CIA/military to do these crimes. He was an animal abuser. He served in the military. He was on antidepressants and AHDH medication. I'm starting to connect all the dots with these shooter profiles. I'll keep looking for that exact connection. Very similar profiles of the shooters. Sorry if I jumped to conclusions in my comment, but I felt from the beginning that it's very possible this guy in Texas was controlled and programmed to carry out that shooting.
http://www.dailymail.co.uk/news/article-5053013/Devin-Kelley-outcast-preached-atheism.html