YMMV / Elementary S 01 E 03 Child Predator

• Complete Monster: Adam Kemper is The Man Behind the Man to Samuel Abbott. When Abbott kidnapped Kemper, Kemper was able to bend Abbott to his will, even forcing him to live in squalor. Kemper forces Abbott to kidnap and murder five children. When Kemper is arrested, he pretends to be a innocent victim with Stockholm Syndrome, and is offered an immunity deal. After Abbott is confronted and commits suicide, Sherlock realizes he's been had. Kemper brags that he will escape prosecution, until Sherlock notices a loophole in the deal, and confronts him while he observes future victims on the playground.