Also, forgot to mention, this reflects badly on the SS. If you think about it, just the publicity on this website hurts their credibility and respect for their professional conduct with some naturally pretty strong and vocal supporters of law and order.
Those are things the SS needs to perform well, just as much as agents, bullets, and guns.
I think one of the problems right now is that all of the incentives drive the Secret Service toward more intrusive investigation and less concern for civil liberties because there is no downside to them for heavy handedness but God help the agents and their supervisor who miss an actual assassin.