Yeah, there's no way that could go wrong.
Surely this rule would create a rather suicidal agency? Or is due cause no longer a civil liberty?
However, I've always thought that judicial system is a mean to check the legislative branch (rather than executive). The reasons being that judicial system has no mean to enforce/ prevent wrong doing (legislative can cut funding), and they also have no way to proactive prevent any wrong doings from happening (you can't do investigation, and anything that reaches the court necessitates a lawsuit).
The only "department of liberty" is you, and me, and other citizens. We're sovereign under the U.S. system of law; empowered to make change in a variety of ways.
But we have to do it. There's no way around the fact that a democracy is only as good as its citizen activism. There are some things you can't outsource or delegate.
1) an army of civil rights defense attourneys to counter the DOJ, DHS, etc.
2) a force of federal agents who have the authority to interefere with any federal, state or local law enforcement activity, but completely lack the ability to touch citizens. Their sole mission would be to detain law enforcement officers suspected of abusing their power, raid illegaly acquired/held state confiscation staches, liberate detained civilians, confiscate/destroy/release government secret records, interfere with unlawful border patrol, and execute on the spot any law enforcement agent caught in the act of violating person's civil liberties.
They will watch the watchmen.