It's sad that some individuals resort to that kind of behavior. There's not much that can be done about a suspect walking into a coffee shop and opening fire on four unsuspecting officers. In many occasions, the court system has failed as well as the parole boards. It's a bad ordeal. Some situations can be prevented...others can't. The bravery of the officer (Missouri I think) that ran up and shot the suspect after the first officer went down at the patrol car door was amazing.