greg bernstein says these charges are an example of a new way of doing business going after violence. >> it started with a homicide and then came all the pay back. last spring he became a homicide victim. he was killed in a home invasion in the middle of the six month investigation announced today by city and federal prosecutors. >> they were sad and in retaliation three people were shot. two wounded, one killed. september 16th, his younger brother was shot greeds and timber 19th, a friend was job. on january 7th, but when did the man shot in april was shot and wounded again. 14 people have been charged and all they say have a history. >> they are violent repeat offenders. >> they say this is a perfect example of how a small group can feel so much violence. >> another shooting here and one victim allegedly shot twice as a part of the cycle of retaliation. >> they say this case represents a greater level of cooperation between this of us, the police department, and something outgoing police commissioner bielefeld pushed for the last few years. >> and now his quotes that he is they are