Like the humans, the River Ghost was a member of another alien species that had been brought to the planet by the Predators. When the used edwin as bait in an attempt to capture and kill one of the Predators, he is instead chased by the River Ghost. It almost caught Edwin, but was shot by Isabelle with a sniper rifle. The group goes to investigate and find out that Isabelle had in fact missed. The real killer turned out to be Noland, who slowly reveals himself to the group.