There is a reason why David Chipman is a FORMER BATF agent. Jackbooted Feral agents are anathema to the proper discharge of duties of law enforcement officers. They are just a little TOO enthusiastic about being the first person in the room. using projectile fire as their courtesy greeting.
Lots of collateral damage in their wake. Dirty Harry was almost benign in comparison.
The feds however? At best, most I've met want scalps while they look for their promotion. The worst are Chipman, Connolly (Whitey Bulger), or Comey types. They all answer to political US Attorneys and their assistants. I got no use for them whatsoever.