It would appear elements of the Capital Police (House/Senate protection), the Secret Service, and the FBI....were connected to the planning of 6 Jan. I’m waiting for ATF, US Marshalls, and CIA to be included shortly.
My humble guess...during the 2008 to 2016 period...recruitment of personnel went ‘south’ and a fair number of new people were brought in to weaponize law enforcement at a federal level.