mnero: In this situation, calling 911 and being interviewed by police, is much different than (rightly or wrongly) being an person of interest.
I completely agree that law enforcement has done many bad things. One of the reasons we know that Tasers and stun guns can be deadly is because of their abuse by law enforcement. But the fact remains that police officers are public servants. As such you as a member of the public should have no fear of calling them. The people who should be fearful are the guys with the stun gun.