This is how mental health is related REPOST http://www.securityinfowatch.com/article/10489768/the-psychology-of-a-mass-murderer[quoute] SIW: What is the psychological profile of someone who’s willing to carry out a mass shooting? Dietz: The real issues with mass murderers is that all of them are both sad and depressed enough to be willing to die and also angry or paranoid enough that they are blaming other people for their suffering and misfortune. Those are two of the critical ingredients, there has never been a mass murderer, acting alone, who didn’t have both of those (characteristics) in mass murders against strangers where mass murder is defined as three or more people dead in one incident for psychological reasons. Are there any warning signs that a person maybe getting ready to commit an atrocity such as this? There are always countless warning signs observed by nearly everyone who has had contact with the person and often for years. Unfortunately, those warning signs are not very specific and so they apply to many people who will never be violent toward anyone but themselves and they apply to many people for short term reasons that will go away. In order to be able to catch in your net, everyone who will do a mass murder, you need to err on the side of catching hundreds or thousands of people with similar behaviors who will never commit a mass murder no matter what you do. When prediction suffers form that problem, it is necessary to be very thoughtful about what you do to the false positives who you identify as having some of the warning signs. This is easy to prevent among employees or students on a campus or patients in hospital, and very difficult to prevent in society at large under our system of law.[/quote] There is also a pod cast of mental health and mass killings posted earlier.