Oh yeah, by Cuba he's defiantely in Mike's pocket. I think he knew in the back of his mind that he was not the killer, but at the time of the talk with Hagen, he was in too much of a fog, and when he did get his sences back, it was too late. As for who killed the girl, it had to be Neri. Why else would FFC show a shot of him standing in the doorway washing his hands/a knife (Ive heard both)