A middle aged man walked into a Planned Parenthood building in Colorado Springs, and proceeded to shoot several people which resulted in three deaths including members of the police force. In other words, this man had a weapon, he fired his weapon, and police finally talked him down to surrender.
Fast backward to an incident in Chicago in which a 17 year old boy was wandering down the street armed with a FOUR INCH KNIFE. A police officer arrived at the scene, stepped out of his patrol car, did not converse with other policemen, he simply took out his gun and blasted away with SIXTEEN SHOTS until the boy was dead. No talking him down, no discussions about how best to persuade this boy to surrender. Just SIXTEEN SHOTS!
Oh, for the record the knife person was black and the gun toting person in Colorado was white.