you might want to spoiler tag this then...

Oh snap! what a twist. my prediction right now: the shooter is not the rat. the shooter just took a huge risk to get rid of Pippen. a) the shooter could very easily have been caught and outed themselves and b) they just made shit a hell of a lot harder for themselves and now anything that they want to do is going to be extremely hard. Considering that, as far as we are aware anyway, the rat has not acted against the tower for a while, I don't think they would take such a drastic step all of a sudden. Unless the theory that Pippen's family was held hostage actually applies to the Rat and Scratch just wanted to get rid of Pippen.