Then came the cell phone footage. The shooter could be seen in front of El Centro college with its distinctive concrete pillars on Lamar St. He was moving and shooting — ducking behind and re-emerging from the pillars shooting at officers. Finally you could see one officer working to engage the shooter move behind one of the pillars. However this time, the shooter was advancing on the officer but the officer didn’t know it. The officer moved to the right and looked down the right side of the pillar just as the shooter rounded the left side of the pillar and from a couple of feet away, shot the officer with an assault rifle. Then he stood over him and executed him by shooting him in the head.