that the engineer missed something or operator error. help us understand what these other possibilities are. how can the engineer not be in some way responsible. i believe he is responsible. there s certainly a small possibility of a mechanical problem. when you ve got a train going twice the maximum speed of 50 miles an hour, to me it s a no-brainer. it s intuitively obvious to the casual investigator the train was going way too fast. generally speaking that s going to be an engineer operating failure. so when it comes to his story, mayor, i want to get your take on this, the engineer s attorney, he spoke to abc news and right now says he has no recollection of the event. listen to hear what he said. he has i believe result of the concussion, he has absolutely no recollection