He lost his beloved sister, the only person he ever loved or who loved him, followed by both of his parents. He rightly blames the District Attorney, and the drugged out vagrant bums who killed her and then were allowed to go free. With no reason to suppress his inner demons, he seeks revenge on the guilty.
This story was told to me by a man who discovers that his wife likes cocks much larger than his own. He relates how he learned this by watching, from hiding, as she is gangbanged while they are on vacation.