wilson martinez ander vin castro in september. christopher perez de la cruz died from his injuries two weeks ago likely victims of a violent initiation. >> it was certain steps for initiation you know and they called it basically getting wet. and that's getting blood on yourself. >> reporter: the federal roundup targeted several communities including somerville where a handcuffed prisoner escaped 18-year-old gabriel castillo perez later captured but fueling tense moments. >> we want to be very cautious and conservatives. you infer know what will happen -- you never know what will happen during an arrest. gang members are salvadorian immigrants who target their own and communities like east boston have felt the rathe. >> these young killers they are not just out to hurt or punch they are out to kill and make sure whoever they stabbing or shooting does not talk. >> reporter: officials say the concern see tallation especially since the east coast leader of ms-13 is among those arrested. and they are watching now to see if anyone trie