In my work done for the National Center for Crime Prevention about 90% of the literature recommended universal quality child care as a way to significantly reduce crime and the costs of crime.  Boys depressed in childhood had a high likelihood of ending up in jail. Another risk factor was punitive parenting.

If you start from the premise that there is an overlap between being a cop and being a criminal (they are often cut from the same cloth)("every cop is a criminal and all the sinners saints") perhaps universal quality child care (early learning and development) could be a long term strategy for preventing the kind of hyper-masculinity and the enabling code of silence which is making police culture toxic if it reduces risk factors in boys and teaches openness towards alternative problem solving techniques.

The cost savings here could be huge if you consider the Perry Preschool findings: of a total public benefit of $195K, the crime savings amounted to $171K.