I know its a stretch but IMO it really is all her fault. Im still upset that at the end of epi 3 its revealed she DIDNT tell Lee about the walkie. I know as a kid in a video game she gets a little leeway because campman probably said he has her parents but everything else is really her fault. I know you can make an argument for EVERY choice in the game and you can probably make an argument for everyone for being at fault but overall Lee would be alive most likely if Clem did things differently. For the masses that dis-agree, Clem is heard saying sorry multiple times at the end. I mean you have to say atleast a SMIDGE she is at fault here.