I just saw this a couple days ago and enjoyed it immensely, but I have a question. At the very end you see him and his wife together in bed and on his chest he has tattooed "I DID IT" which means he killed the guy. If he killed the guy and had it tattooed on his chest to remind him, why did he continue to search? Furthermore, what happened to that tattoo? Either I missed something pretty significant (I watched it twice) or this is a fatal flaw in an otherwise brilliant plot.