Right until Zhang Heng fired his gun, the incident that happened in Nassau not too long ago wasn't of the minds of the crowd. Zhang Heng eliminated Wilton and his men of two hundred pirates, leaving unscathed. Those who were on the ship after the massacre described the cabin as a slaughterhouse. The entire floor was awash with blood.
Throughout the entire hunting trip, Zhang Heng had been inconspicuous to the point that most forgot he was a man of his word. In a life-threatening situation like this, Zhang Heng had no interest in playing the Werewolves of Miller Hollow with Jarvis. He had done his part by informing Sam and the rest of the captains about this incident. Having them believe what he said was out of his control altogether.