I think all these stories put Larkin Roses article   When Should You Shoot A Cop  into perspective.
http://www.copblock.org/5475/when-should-you-shoot-a-cop/  This type of lawlessness, a lawlessness that  makes a charade of any concept of rule of law or justice. It seems that there would be all sorts  of discussions about solutions since the price to pay for doing nothing is so high. We can continue to do nothing and what WILL happen is that some Americans will get fed up and doing what should be done to these cops. (Dispensing justice)  This is what the powers that be want  and have planned for.  Then they will call them terrorists (when just the opposite is true) and the war will be on. All I can say people is that we need to do something substantial and do it right now before this goes any further down hill. A start would be locking up of thousands of cops for multiple years. But how do we get there?