My 10 year old son keeps saying, "I thought the police were our friends?" Frankly he is traumatized by the actions of the police he is seeing on the news. Yesterday we were driving to the pharmacy to get some medicine and he suddenly started crying and freaking out. It turned out that he saw a police car and was convinced we were going to be pulled over and killed.
Thankfully my state has just passed a law making it illegal for police to enter elementary or secondary school grounds except in the case of an emergency. At least he will probably be safe from the police at school.