new orleans : the cabildo museum 's security staff discovered a gruesome murder that occurred sometime during the night in that state-owned historical building the body of museum director etienne barbeau was found lying on his back in a massive pool of blood on the museum 's grand staircase barbeau had been stabbed three times in the back with what is believed to have been a ten-inch carving knife it is believed he died within minutes from massive lung perforations .