I can understand being absent minded and concentrating on other things to the point you're so laser focused you forget some small things around you. But how in the hell do you forget your kid is in the backseat of the car, much less come back to the car hours later and still not see the kid in there. It makes no sense, it's hard to believe the guy did it on purpose, but it's hard to believe he didn't remember him twice. Really sad and tragic.