There is a documentary out there; it is on You Tube and about 95 minutes long
The War on Kids: The Definitive Documentary on the Failure of the Public Education System
If you watch this, you will see how the drugging of kids with Ritalin and similar drugs has been shown to be present or part of the history of EVERY kid involved in mass shootings and major incidents.
It isn't the video games, it is the failure of the education system resulting in the use of psychotropic drugs that have caused a lot of what we are dealing with today