Sorry, but I'm still not seeing any connection between the two incidents. In one, the officer who was murdered presumably acted reasonably and in compliance with his training. I trust we'd all have a problem if SOP on traffic stops involved approaching a car stopped for speeding with a gun drawn and aimed at the driver; there was only so much the officer could do to protect himself in that situation. In the other scenario, the officer was not forced to execute the driver - along with, potentially, anyone else in the vehicle - to save his own life; he could have stepped or run out of the way, which is what police in most places are taught to do. There were certainly enough police cars on the scene, let alone however many more could have easily been called to assist, to box the suspects in at some point.