Later in the episode (on the train), Duck starts to cough up blood and Katjaa realizes what has to be done and asks Lee to convince Kenny stop the train. She (and Kenny, depending on Lee's choice) take Duck out to the woods. The group hears a gunshot, assuming Katjaa killed Duck. If Kenny goes with her, Lee hears him cry in distress. It is revealed that Katjaa, out of extreme grief, killed herself. Lee has to choose whether to kill Duck himself or have Kenny do it, or alternatively, Lee and Kenny can leave him there to reanimate. Lee can either mercifully shoot Duck while he's still breathing or wait until Duck stops breathing to put him down, while he stops breathing no matter what before Kenny pulls the trigger.