After committing a series of multiple murders, a neurologist visits an incarcerated killer, living in exile. She studies him and his brain and discovers the horror that lurks behind his violent impulses.
Two animals die. In the film's beginning, the protaganist strangles a cat. You see him approaching the animal with a rop, then it's shown deceased. Toward the film's end, the protaganist's perfectly adoptable dog is euthanized by an animal control facility.
At the beginning of the movie there is a little boy and a cute cat. He approaches the cat with a rope to strangle it and then it is laying dead. There isn't anything shown, but still sad just the same.