One thing that has always puzzled me...
Somebody kills somebody, and when they in turn get killed, someone wants revenge. In this case, the father of a murdered girl kills Julian's brother. Now, Crystal wants revenge. If Julian kills the father, who will kill Julian to avenge the father? And so on, and so on. I guess some people just think their lives are worth more that those of others. Typical criminal (read sociopathic) mind.
Crystal must think she's in the Mafia.