Episode 7 - Seth takes Brenton's mother to a dark alley where he tells her to shoot a chained dog (just to show her that it is not easy to kill a living being). She does not shoot the dog, don't worry!
The father of the killed boy works in a slaughter house but you don't see/hear any animals being killed. You do see loads of chickens in cages and a couple of sheep for a brief moment. There is also some blood on the floor.
A positive moment - one of the detectives loves dogs and takes care of old dogs.