One plot issue.
Would law enforcement really kill a vengeful father, one they have in custody and will soon prosecute for home invasion, assaulting a police officer ect, just to protect a witness? How were they gonna explain that he escaped from custody, after telling everyone he was caught somewhere else, got wasted and stumbled onto some train tracks? The body wont be hard to identify with finger prints and dental records, even if it gets mangled by the train. That whole police sub-plot felt unresolved.
"World needs bad men. We keep the other bad men from the door."