McMonagle, though, pounced on a key detail the prosecution did not raise, that about the time of the derailment, in the same area, a SEPTA train reported being struck by a rock. Bostian had been listening to radio chatter about that incident, Hines said, and passed the damaged SEPTA train in the minutes before the derailment. McMonagle didn't dispute that Bostian was going dangerously fast as he entered the turn. Instead, he raised an explanation for the disaster that came up a year and a half ago when the NTSB concluded its investigation, that Bostian had become confused as to where he was.