I think it`s disgusting, if in fact to be found true in the investigation , that this crew was operating after a 15 hour duty day.
I hope there will come a day in aviation when we can all look back at those STUPID and UNSAFE duty days for what they were and ARE ; a usual contributor to accidents , totally out of line with common sense , basic human physiology and that there removal ( flt duty times ) was long overdue.
US companies that pay lobbyists for the continuation of these rules have blood on their hands.