rise of the warrior cop

Why are SWAT teams engaged in everyday policing? Why are suspects of nonviolent crime being shot? Radley Balko discusses his new book "Rise of the Warrior Cop: The Militarization of America's Police Forces".
I worked hand-in-hand with SWAT and believe that its primary mission is to save lives, yet I also agree with Balko's demand for more transparency and accountability from law enforcement. It is this lack of transparency that contributes to the notion that law enforcement has run amok.