No matter what, Carley insults Lilly, telling her that she is acting like a "paranoid, scared, little girl", which leads Lilly to believe that Carley is the traitor, and she shoots Carley in the face when she turns to face Lilly after watching Kenny kill the walker trapped under the RV.
What happens if you let Lilly stay?
Allowing Lilly to stay (Alive): If Lee allows her to stay with the group, she still reveals Lee's criminal past to the group due to shock. ... If Lee refuses, Lilly will force him out of the RV and drive off, and if he accepts she will tell Lee to get Clementine but instead, tricks him and steals the RV.
Who kills Carley?
Carley is devoured by walkers or is shot by Lilly. Carley is a quick-thinking reporter who is also a good shot. She makes her first appearance in The Walking Dead Video Game Season 1.