[PapaBear3625]

Put another way, how many local law enforcement officials would be willing to arrest a federal officer, knowing that laying hands on him subjects them to between 8 and 20 years in federal prison under 18 USC 111?

[brent13a]

Put another way, how many local law enforcement officials would be willing to arrest a federal officer, knowing that laying hands on him subjects them to between 8 and 20 years in federal prison under 18 USC 111?

I'm never quite sure why people are certain that the local PD is automatically subordinate to the local FBI office or any variation of that thinking.
Chiefs, Sheriffs, and such would simply back up their officers and deputies when the feds roll in to town and tell the feds "Go do what you gotta do, we'll be right here."
The local law enforcement doesn't HAVE to assist the Feds nor would local law enforcement have to go hands-on and arrest them.
It would simply come down to the police not backing up the Feds in their unconstitutional goings-on.
Police serve at the behest of their cities and are authorized by their state, and Deputies serve at the behest of their counties and are authorized by the state. Neither Police nor Deputies enforce Federal Law, they enforce State Law and therefore are not subordinate too nor answer too Federal Law Enforcement....unless it involves a Federal case and their chain of command authorizes cooperation.