CNN — US LAW ENFORCEMENT ‘VERY NERVOUS’ ABOUT PROACTIVE POLICING AS GUN VIOLENCE SOARS

"I'm an older white guy. I'm going to stop, I don't feel threatened," said Jeffrey Butts, a professor at John Jay College of Criminal Justice. "There are people whose rational expectation is that (the stop) puts them in danger. They're going to have different response. It's amazing to me that we haven't confronted that and individual police officers don't think about that. They're just shocked and angered by someone daring to not comply."