I'm a bit puzzled about Klein's statement that they know the "how" but not the "why". (And now that the parents have been arrested, they are probably the "who"). Ok the how. How what? How they killed him? Unless Deorr's body was found, there is no "how" that can be known? I think someone would have had to have witnessed the killing. So, likely GGP or IR. I wondered if the overalls recovered<modsnip> Horrible thought, I know. By saying they don't know "why" it sounds like it was an intentional act, whatever happened. I hate to think the parents were cold blooded murderers who killed him for no apparent reason. Seems like SOMETHING had to precipitate it, if they are guilty.
Thoughts?