Here's a scary article I read recently:

http://www.democraticunderground.com/10027012236

Americans are wondering, “What’s wrong with our police?” Remarkably, one of the most compelling but unexplored explanations may rest with a FBI warning of October 2006, which reported that “White supremacist infiltration of law enforcement” represented a significant national threat."
I guess they need to fire everybody and start over. The body cam idea is a joke. Getting filmed has not stopped the violence.