Ok stick with me for a minute. I'm leaning toward the rat/shooter being Riley. She seemed to be I. The area when it happened, does not have a good alibi, and seemed to over react at seeing Pippin dead. ( she hid in a pile of dead bodies for god sake). I really don't know what her motive is, but I still think it's her.

That being said, at the end of this episode Kalani calls to the tower and she answers. Riley answers! What if she is the rat and instead of telling Micheal that the chopper might be salvageable she tell Durai or any other Mallers. Then then head to LAX and attack Kalani, Datu, Burt, and Saul.

I know I'm going out on a limb, but I had a pretty good silent freak out when I finished this episode and wanted to share my thoughts.