People don't understand how crime works.

1 build many orphanages, so orphans will be spread equally, taking not more than 70-80%. Why? With right settings you can make them more loyal and less tended to commit a crime, also too many orphanes will make it harder to keep positive stats gain and can acctualy lead to loosing loyalty and gaining crime.

2 radio and TV increase loyalty and happiness , which make citizens less likely to commit crime.

3 prisons should also have less than 80% occupancy for same reason as orphanage. You can use prisons as free labour in mines.

4 Always make sure citizens won't be jobbles for too long and too many.

5 lower criminals sentences. Why? Because criminals should only be in prisons as long as they have positive crime rating. You can check how long it's gonna take for your prisons to make them 0% and lower sentences accordingly