Police work is a difficult job. Split decisions in a matter of seconds determine a life or death situation. Men who had previous criminal records, maybe bigger and stronger than you, are resisting a criminal arrest. While protecting your own life and doing your job, the arrested dies. It was not planned or premeditated, but unfortunate. Monday morning quarterbacks say they would have acted differently. Let him take your weapon and then wrestle it away from him. Stand up and duke it out with him until he surrenders peacefully. A cop is killed, mourned by family, but that's okay, it's his job.