It was this kind of thinking that made me almost certain that
Pegs was the traitor. Some of the conversation during the party between her and
Bill was fishy. For example, when he asks for her name and she replies, "Pegs. You already know this." Why would he know this? He never leaves his room. Then I thought, well he did get sick and someone had to look after him, right? But I think
Riley was in charge of that. Then there was the part where she pushed
Michael to drink. I was thinking the same thing you were...but in the end it would make no sense because the rat knew that they had no ammo. Besides, I think she wanted Michael to get a little tipsy cause of her plan to express her feelings towards him.
On another note, I don't know if this has been mentioned before but, is it possible that
the Mallers got a hold of the radio that
Saul was using when he followed
Scratch and
Latch. I believe he dropped it when they began to shoot at him, right? Could they have contacted
the tower by looking at the channel that radio was set to?