Bad Presidents, definately. Presidents directly involved in murder conspiracies and terrorist attacks? Not that I'm aware of (Though I'll admit it's possible I still doubt it). Unless you're one of the "Bush did 9/11" wackjobs. (I don't mean you personally there :) )
WHen I worked at the Pentagon, during the Clinton Administration, I was asked if I would accept an appointment from Bill should it be offered. As much as I loved being there, I refused stating that it seems most of those who have been appointed by him were either in jail, resigned in shame, or were dead. THe position considered was a Presidential appointment, but I doubt I would have ever met him personally.
Were ever a president possible to commit conspiracy or making deals with the devil, Clinton could have.
I suspect that the Secretary did not die, and after all is said and done, he will be president.