This is not true but people will just say it anyway. It doesn't matter what evidence you present.
If they looked at it, they would have to change their fundamental view of reality. Therefore, they will not look at it.
You reduce crime by hanging the worst criminals.
You reduce crime by eliminating poverty. The reason so called nice neighborhoods have lower crime rates is because people’s basic needs are being met. It is not because of police, alarm systems, or neighborhood associations. Poverty creates crime.