Article listing many US mass shooters details the psychiatric drugs they were on or had just stopped taking.
http:// www.wnd.com/2018/02/media-ignoring-1-crucial-factor-in-florida-school-shooting/
While they may be creating the diseases that only they have the cure for, they have no intent of making the cure available to the people. There's no money to be made in providing a cure. Their only interest is selling disease treatments to suffering people in order to bleed every last cent from people before they die.