http://www.cnn.com/2015/03/12/us/ferguson-protests/index.html
The article "Ferguson police shooter on the loose" talks about another shooting in Ferguson, Missouri. This time it was not the policeman in question, but the policeman being the victims. Two Ferguson police officers were 'ambushed' outside of their Station by unknown shooters. The two officers survived but each sustained serious injuries.
I think people are stupid. Yes, you can be angry about a black kid getting killed when he probably shouldn't have. But that does not mean yiu can go around attempting to murder police officers who have done nothing wrong. People are crazy and overreact to something that is obviously wrong but in most cases doesn't even affect them. These men were shot because of a noble profession that they have chosen which makes the people who shot them worse than the people they're mad at.