Mulligan (The Duke of Dominoes)
From Tardis Wiki, the free Doctor Who reference
Chief Mulligan was a police officer in Chicago in the 1930s. He was in the pay of gangster Joe Clementi.
When Clementi sent Mulligan to arrest his competition, the Master, the Master hypnotised Mulligan and took thirty dollars from him.
Mulligan later turned against the Master. (PROSE: The Duke of Dominoes)