They're Real,They're Hungry and They're Here. ( Monster of The Week)
Drunk, Reviving powers.
During the Underbridge episode, it was discovered that Bill possessed the ability to revive people. He made a deal with a demon and of course was screwed over, he was unable to revive his wife and had to give up his daughters life in exchange for his powers. (The deal was that Liza must be murdered or sent through a portal) His powers twisted him and he used them to murder his neighbors and then bring them back to life. He refused to kill his daughter and upon failing to complete his part of the deal, he has allowed for the demons powers to increase so as to make portals to persuade him.
Currently in Agency custody.