Thank you all for your responses.
I think we can agree:
1. There is a procedure in place that must be followed.
2. The cops (both here and there) don't give a damn about the procedure, and will do whatever they want to get their job done and make them look good.
Now for my save-my-own-ass question: Do we also agree that the Federal authorities (FBI or Marshals Service) don't get involved (at least not automatically?)
If my buddy does the stupid thing and stops cooperating, and the Feds are going to be breaking down our door, I want to make sure I'm in a new place by then. Granted, there's probably not much difference between the state police doing it and the Feds, but as much as I don't trust the state troopies, the prospect of the Feds doing it makes me sick.