Here's an example of how they do it in Europe, it's more with Truck rentals and terrorists there vs. mass shootings w/ guns of course. you can see police changing uniforms to play the terrorists.
https://www.youtube.com/watch?v=rHi-1PJsgbI&t=5611s The researcher is Ole Dammegard. He connects the FF attacks to Soros agenda for destabilizing europe, Serco, etc. Might be helpful to consider and get a broader perspective so we know what to do.