There are a lot of things to consider, including what you consider a crime.

I read one article that described how because of the increase in police presence in schools students were more often being handled by the criminal justice system like the common school fight, that would’ve otherwise not been included in assault statistics in the past.

During the crack epidemic many small offenses, such as petty theft were being punished harshly and used as an excuse to put more resources towards the war on drugs rather than diversion and treatment.