Blood and Oil
William is the current patriarch of the Layfayette family, just as much nobility in Detroit as the Fords. Like all heads of the family before him, he is a Ghoul, under a viniculum to his supposedancestor. However, means of contact with his was lost when the Prince disappeared, and he has mostly avoided the city. He has to be feeding his blood addiction somehow, though, and no one hesitates to suspect Invictus got to him.