When I was growing up, my hometown sheriff would cruise through the predominantly black ghetto in a patrol car, windows rolled down, calling over black youths from the sidewalk or the basketball court or the front steps and porches of their own homes in order to "give them a good talking to", telling them they were no good rotten filth, that they and all their family and friends were a societal disease, that he looked forward to seeing them behind bars.
He'd laugh as they sat there and took his abuse, because those who didn't invariably ended up with their homes raided under warrants issued thanks to "information from an anonymous informant" and they always conveniently "found" hard drugs in the process. I remember when he finally died, there was a massive celebratory block party throughout all the neighborhoods he would frequent. For a while I heard a particular phrase shouted out at school at every chance, "Ding dong, the prick is dead!".
The police ostensibly exist to serve and protect. But anymore it seems all they do is intimidate and destroy.
You think a particular portion of the community is at risk to engage in criminal behavior? You even have fancy algorithms and predictive modeling programs and whatnot? Fine. Start an outreach program. Find ways to better the lives of those most at risk. Help them to lead happy, safe, productive lives. Develop trust and foster community.
Happy people don't become hardened criminals. Desperate, miserable people do. If you want a world with less crime, then work toward a world in which fewer people have a reason to break the law. If instead you want a world with more crime, send your jackbooted thugs around to "squeeze" the most at risk segments of society.