TexasCHLforum.com

People often point to mental illness, violent video game play and ownership - legally or otherwise - of firearms. The problem with using any of these as a marker is that millions of people have or do each while a minisculely small percentage actually become mass murderers or even violent.

So while one or all of these markers are almost always present in mass murderer, they really are not predictive of who will become one.

So it seems to me the only real solution is to allow/encourage people to defend themselves again.