Kyle is killed by Routh on a Texas gun range. Routh reportedly suffers from post traumatic stress disorder. Erath County Sheriff Tommy Bryant:
Apparently Mr. Kyle works with people that are suffering from some issues that have been in the military and this shooter is possibly one of those people, that he had taken out to the range to mentor, to visit with, to help him, you know, that’s all I can tell you. Kind of have an idea that maybe that’s why they were at the range, for some type of therapy that Mr. Kyle assists people with, and I don’t know if it’s called shooting therapy. I don’t have any idea but that’s what little bit of information that we can gather so far.