I think they know that there were no mechanical problems, no weather issues, no projectiles able to force a huge train to speed up, and no terrorists at the controls....
I think they know that the little train engineer was at fault...period...
granted, he could have been mixed up, lost track of the time, maybe he fell asleep....I don't think this was intentional...
or, he might have been on and off the phone....we'll see....I wonder if he had porn with him....
I think the kid was texting another peter puffer or looking a gay porn and they DO NOT want a queer responsible for all these deaths