They absolutely knew there were plans to storm the capitol building, at the very least. There’s the interview with some Black Capitol Hill police officers who weren’t involved in any kind of intelligence gathering, they were just working that day and managed to hear about the rioters’ plans earlier that morning. They were freaking out because they hadn’t been told to prepare for this kind of event, their concerns weren’t acknowledged and the command structure basically ghosted them on the day - absent and un-contactable. They quite justifiably feel like their white colleagues and chiefs threw them to the wolves, because yeah, that’s what happened. They were getting beaten up by rioters shouting the n-word at them on one side of the building while their white colleagues were taking selfies on the other.
All the pictures and reports that keep coming out of the police actively helping rioters really shows where their sympathies lay. The most recent picture I saw was of a cop tenderly washing out the eyes of a rioter who had been hit with some pepper spray or tear gas. Compared to the BLM protests where the cops actually tore down medical tents and stole, destroyed or pepper sprayed water bottles intended for this purpose - and even assaulted anyone providing that aid to protestors.
