Violent crime usually only goes down when a victim blows a hole through the chest of a violent criminal trying to rob or kill them. I observed the pattern for many years. Every time an armed robber got killed, armed robberies dropped to near for a while. This is because the average violent career criminal has an animalistic mind. They reason like a more primitive species of man, roaming the grasslands looking for another primitive man to beat to death with a club they made out of some large animal's