Complex sentence: Most of the gangs seem open to the idea, but he is fatally shot by the Rogues leader, Luther ― this murder enrages the assembled gangs, and after Luther frames the Warriors for the murder, Cleon is beaten savagely by the Riffs.
Split into simpler sentences: Most of the gangs seem open to the idea, but he is fatally shot by the Rogues leader, Luther. This murder enrages the assembled gangs, and after Luther frames the Warriors for the murder, Cleon is beaten savagely by the Riffs.