The_Iceman

Answer: Forbes slipped up by mentioning the head bad guy's name. And, as good an agent as Forbes was, it is highly doubtful, not to mention suspicious, that he'd still be roaming around by himself this long after the fall of the White House. Plus Mike ain't stupid and most likely smelled a rat. And he was correct. Forbes was dirty.

Alan Keddie

Answer: Mike was told that there was no other agent alive in the White House, and they didn't send any more to attempt a rescue, that means if all the good agents are dead, only a rogue one can know who the mastermind was.