What are you guys talking about?
He was an officer or what ever military related, his wife drowned their kids so he killed her.
The movie has a different ending than the book. In the book there is no hope, he just goes back to his old way of pretending that his some kind of cop.
In the movie they leave it like he understood what he had done and that he decided to fool everybody to end it faster by acting like he has no clue of whats really going on.
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