And by 'he', I mean Ben. If you think about it, him stealing the meds caused the bandits to attack the Inn, which attracted the Walkers, which happened to bite Duck. Duck's bite had caused Katjaa to suicide as she didn't want to live with her son dying. On top of that, Lilly shot Carley/Doug because of the traitor in the group. She shot Carley, because Carley stood up for Ben, where as Doug took the bullet for Ben. That had then caused Lilly to be abandoned. So again, who is to blame? Ben. It would have been best off if we kicked his ass out of the group in Episode 2, before he officially joined...because of one single person, we lost four/five people.
Lilly, Carley/Doug, Katjaa, and Duck. :(
Screw Ben >_