35% of U.S. mass shooters are military veterans, as compared with 14.76% in the general population for the same gender and age. See documentation of this below.
First a couple of Tweets:
Now an image from: https://jrotceagles.com
Whether the latest school shooter’s participation in a JROTC program that took NRA money and trained in marksmanship contributed to the shooting or not, it is symptomatic of a culture in which many schools are forgetting that