Nobody should be surprised that removing an entire portion of the population would cause the homicide rate to fall the same way nobody would be surprised that there is less rainfall on a day that has less cloud coverage. This isn’t really addressing my point at all. The point is that crime happens because of a set of conditions. You cannot expect crime to be reduced if you remove the “criminals” without addressing the conditions that made them criminals in the first place. Homicide is not a good example here, a better example would be things like petty crime, vandalism, etc.