So, if Hillie's accomplice dies (1) in his garage from carbon monoxide poisoning from a car that never had gasoline in it, it's "fostercide." If he dies (2) while in custody from natural causes, it's "Arkancide." And, if he tells the truth about Hillie, then, loop back to (1) or (2).
Did Willie pardon Hiltery for all past and future offenses just in case something stuck ? maybe just Snake Oil