Dino (Peter Stormare) killed Longdale with his crossbow. So everyone in that group, except for Cage, was dead by the end. Longdale shoots Dino before he dies, killing him in turn.
As for the other two, Cage had nothing personal against James G and Machine, bar some emotional investment in the matter. He was just a regular family guy, which is why he didn't get creative or torture them to death like a professional. He wanted to avenge Mary Ann and Max, so ending their lives was justice administered. Plus, Machine was trying to kill him so he had no chance to prolong his death with torture.
Great movie 7.5/10
I guess I blinked and missed Longdale getting killed. One other problem I had with it is why protect the Christian estate from the victim's mother. All she got was an envelope of cash, which couldn't have been more than fifty or so thousand dollars, from Mrs. Christian for her husband murdering her daughter. She should have gotten the whole estate, but I guess he couldn't testify to that without incriminating himself for murder.
Yup. That and he promised confidentiality when he took on the case. Plus, the film / evidence was destroyed.
Do we actually see how big the envelope is? We see the one he gets, but not hers. Maybe he it was a few hundred thousand.