”Ninety-five percent of the time, we get to the scene late.”
Police officers know that criminals who fear being injured attack fewer people and they also know that legally-armed citizens thwart violent crime 24/7/365. The more you discourage your violent criminals, the less violent crime to record and the better looking your violent crime metrics become....blood running in the streets. But, as a police chief observed: "They said that about Open Carry, we didn't have anything with that."
– Sheriff David Clarke, Milwaukee, Wisconsin
https://en.wikipedia.org/wiki/Clarence_Thomas#Second_Amendment
Civil Rights and your Right to Armed Self-Defense, Justice Clarence Thomas's concurring opinion in McDonald v. Chicago.
DC39 Why Discourage your Criminals page89