Law enforcement needs to concentrate on breaking up youth gangs, this is where all the problems start, from neanderthal tribal alliances. One bad egg gathers a gang around him, pollutes their juvenile thoughtlessness with criminal actions and plans, and it all goes to hell in a handbasket from there.
Criminals rarely work on their own, they rely on criminal cohorts to keep them informed, help cover their tracks, and to go on criminal "adventures".
Reform starts with juvenile reform camps, sometimes called "boot camps". The juvenile crims need to be taken out of their criminal associate environment, taught self-discipline, taught to avoid criminal urges and taught that they have self-worth. Much criminal juvenile behaviour stems from bullying, low levels of IQ making them prone to criminal behaviour and encouragement to commit crime, and poor parenting. The boot camps need to replace the poor parenting with fair but firm training and activities that occupy their time, teaches them useful skills and which burns up their physical energy.
An old farmer told me once, his Dad had a saying, "young men and young horses need to be worked hard!". Juveniles with excessive time on their hands, and no outlet for their energy, is something needs to be addressed. This is where the Police and Citizens clubs used to do good work. The clubs seem to be declining in their activities, no doubt due to overworked and burnt out police officers.