I discussed the role of civilian response in the Texas Tower sniper case here.
One of the men who went up the Tower that day was officer Ramiro Martinez. In his memoirs he has some interesting things to say about the actions of the civilians in Austin.
I was and am still upset that more recognition has not been given to the citizens who pulled out their hunting rifles and returned the sniper's fire. The City of Austin and the State of Texas should be forever thankful and grateful to them because of the many lives they saved that day. The sniper did a lot of damage when he could fire freely, but when the armed citizens began to return fire the sniper had to take cover. He had to shoot out of the rainspouts and that limited his targets. I am grateful to the citizens because they made my job easier.