The data is 1989. 18 years makes it outdated. A Police Officer with five years of experience is just off of probation. My latest training recommended hitting the cranial vault to disrupt the central nervous system. I agree with TR that shot placement is critical and can only be achieved with practice. I like Recon Econ's theory of 1911 Chunking only I use the Kell Light. Since I cannot run as fast in my senior years, I have become quiet accurate with the Kell Light and have ended several foot pursuits with a flick of the wrist. I am willing to teach the skill for only $750 a day.