http://www.bbc.co.uk/news/world-us-canada-21839198
No threads on this yet? James Seevakumaran seems to have planned to use the fire alarm to lure students outside to shoot them, but killed himself instead.
Another tragedy prevented because someone had a gun.
Finally a murder/suicide asshole who got the order correct.
Good for him! That is a perfectly logical way to deal with a compulsion to commit mass murder. Someone needs to produce a PSA promoting this.