Inside Job

A group of notorious criminals, made of six members, all going by animal code names. Leader 'Snake' his friendly, but bitterly incompetent brother 'Dog', brains 'Lion', third wheel 'Tiger' side-kick 'Wolf' and overly violent 'Bear' but one day Tiger is killed with a simple gunshot. They dig around and find that one of their members is cop, and as more members are picked off, it seems like the notorious crime group may finally be bested by the cops