The leader of the National Transportation Safety Board ( NTSB ) team investigating Criminal_investigation said Statement it was likely that the accident would have been prevented Preventing_or_letting had positive train control Control ( PTC ) been installed Placing .

After reiterating Statement its earlier conclusion that PTC would have prevented Preventing_or_letting the accident Catastrophe entirely , it found Know the most direct cause Causation was Rockefeller 's inattention as the train entered Arriving the curve .