I think 100% of the modern era mass shootings have been some level of strategy, triggered, managed, etc. by the satanic oligarchy to manipulate & brainwash the sheeple. They have dozens of ways to set up, set off, manage & manipulate these things afterwards.
The FBI has already said that they are going to ramp up surveillance with emphasis on anyone opposing government.
They have to have quite a few in their database. They know their medical histories, interests, weakness, what pushes their buttons, and their whereabouts 24/7. I don’t think it would be too hard for them to change their social media posts, texts anything to suit their narrative once one of them does something crazy.
We all know what fast and furious was all about; gun control and eventual confiscation. The police state agencies and DOJ are not controlled by Trump. They do not have any external controls which makes them ideally suited to control by rogue elements, hostile nations, and/ or deep state.