While Alferd is in your posse, your opponent gains “Repeat Shootout, Pay 3 Ghost Rock: Alferd joins your posse, under your control.”
Situation: Player A owns, and has Alferd in a posse, and the opponent takes control of him. Player A doesn’t have the money to buy him back.
Question: Does Alferd go back to the owner at the end of the shootout, or does the opponent keep control of Alferd indefinitely (until the next shootout, when he may be taken back by the owner)?