I don’t anticipate the FBI pursuing this at all. First, they have to realize that they screwed up big time and if they think Adriana is dead, then there is no way that Chris is going to flip now. Secondly, if they think that Adriana did flee, chances are she didn’t tell Chris. Therefore, they aren’t going to be the ones to break the news to him that his missing fiancée was an FBI informant and risk him finding and killing her.

I’m pretty sure that Chris’s unexpected visitor will not be the FBI because they would be expected.