The following video is 1hr 50 mins long. If you are on a mobile device please scroll down to the video.
Psychiatry is the most dangerous and, in my opionion, the most evil thing on the planet. The video below will prove to you that psychiatric drugs cause most, if not all, the atrocities of schoolchildren getting shot by rampaging students/peope, and other shooting incidences.
As an aside, the US Military create manchurian candidates by using pain, drugs (a mixture of psychiatric drugs and other psychadelics) and hypnosis, which this video does NOT touch on, to create people who can be programmed to go on a killing rampage. All they have to do is also create a trigger phrase or word that activates the killing impulse, activate the individual using these and away they go. It will help you understand the stories you hear of people suddenly doing this sort of thing.