The chief of capitol police has now resigned - apparently they never planned for the possibility that the protest would turn violent like this!! They even removed barricades to let them get closer to the building.
https://www.theguardian.com/us-news/...lure-trump-mob
I assume that capitol police would not be under Trump's control as Congress is s separate arm of government.
Given that right-wing political violence is likely to continue to increase - especially if Republicans keep losing elections - the complaisant attitude of police is going to be a big problem that will need to be addressed.