In the Line of Duty

[AFTT47]

That is the natural result of cops not being held accountable for their actions.  When the system fails, people take matters into their own hands.  It would greatly reduce the number of cops being murdered if the bad cops were held accountable for their actions.  Until that is done, everyone should expect people to be killing cops, out of anger and frustration, as well as fear of what the cop might unjustly do to one.  If cops are murderous thugs, you better kill them before they kill you.  The solution to the problem is to hold cops accountable for their actions, and convict the murderous ones of murder and put them in prison or execute them.  Until police are punished for abusing their authority, cops will continue to be murdered because of it.

You are making a very dangerous statement. No civilian should be expected to kill police members. 

He is saying it is a logical consequence of so many cops getting away with murder. He's not encouraging anyone to do it or saying that anyone should do it. He's saying that we can expect it (murder of innocent police officers) to happen because of human nature. The people will take only so much before they start turning on the police. Frankly, I'm surprised we haven't seen more of it.