The commuter train involved in a deadly derailment in the Bronx was doing 82 mph as it entered the 30-mph curve where it jumped the tracks. The National Transportation Safety Board based that number on preliminary data from the event recorders taken from the locomotive and another car. The data showed the engineer cut the throttle six seconds before the locomotive came to rest and applied the brakes five seconds before, a move Weener said came “very late in the game.” But the engineer, William Rockefeller, and the rest of the train crew were still being questioned Monday afternoon, and the cause of the derailment has not yet been determined. We will have more as it comes in.