>> barbieri: they were establishing the fact that this was their territory, and they were willing toight to keep it. >> stahl: deputy police chief barbieri was desperate for a way to break the gangs' hold on the community, so three years ago, he agreed to let cutone and a small team of elite troopers-- most of them war veterans, too-- target the north end, which had become a violent marketplace for some of the cheapest heroin in the whole country. in addition to drug busts, they walked the streets, knocked on doors, hung out in neighborhood shops trying to woo the locals. >> cutone: here for pastries today, food? >> woman: yes. >> cutone: outstanding. this is the best place in springfield! >> stahl: but there was a lot of skepticism; not everyone welcomed the troopers. >> cutone: i could remember one door, the last knock of the day that i had. a grandmother comes out, and she just teed off on me. wanted nothing to do with me, used colorful language, said the police were racist, et cetera, et cetera. >> stahl: but they kept at it, almost daily... >> cutone: trooper mike cutone. nice t