When I watched Docu years ago before they had caught Diehl-Armstrong I thought it was obvious who was behind this (Not Ken Barnes as he was not mentioned in the 1st docu I watched, also thought it was clear Rothstien was in on it after what else went on around these pair it seemed very clear, but knowing/highly suspecting is differentthe police will have known who were suspects pretty quick but it is all about proof. Enjoyed this Docu had a lot of info but it could have been done in 3 parts or even 2 but as they do they drag it out (thats a money thing as we know).. Was good to learn of who else was invlolved as I did not know much about some of the others or had not even heard about them, I think most people who watched any docu about it before they were caught guessed Diehl-Armstrong and Rothstien wre right in the middle of this nasty crime. [spoiler]We will never know if Brian knew what was going on - my guess is he did but I do not think he thought the bomb was real he was that calm at 1st until he heard the ticking noise or whatever it was then you saw panic and a desperate man...[/spoiler] Watch if you like true crime docus just be warned part 1 as others have said is pretty graphic/disturbing in one part [spoiler]when the bomb go's off around Brians neck could shock some people (which I understand)[/spoiler].. Just give it a watch well worth it a bit dragged out like this comment..lol