the nlb, the norton only berry gang and the cbo, the cape verde outlaws. >> tensions have grown between groups. >> when they're on their own turf, gang members don't usually hide. so a slow drive can almost serve as a role call. >> see him right there? >> every time someone gets shot, his mother used to run up, sit steffon? >> i've been dealing with steffon powers for about seven years. he just got wrapped up into being a gangster. >> i look at a kid like steffon and i see myself. that could have easily been me. >> i want to see you moving. change your angle, change your angle. start shadow boxing. go. shake it out. go, go, go. br br brendon, if you end with your left, go to the right. >> i work out of area b-2, which encompasses the rox bury neighborhood. >> he works with youth boxers throughout the city of boston. >> it's a place where kids with learn self-confidence, respect, sportsmanship. it makes them a stronger personal. not just physically, but mentally, as well. >> how are you doing? >> lieutenant bailey, head of the gang unit, has brought his son zach here to train. his first