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Bill Bianchi was shot to death at close range on a lonely country road late one night. The police soon established that the murder was committed by one of four men, Al, Jack, Joe, and Tom, and that the gun that was used belonged to one of the four. Each man was questioned and made the statements listed below, two and only two of which are true in each case Al: I didn't do it. Tom did it. Sure I own a gun. Joe and I were playing poker when Bill was shot. Jack: I didn't do it. Al did it. Joe and I were at the movies when Bill was shot Bill was shot with Joe's gun. Joe: I was asleep when Bill was shot. Al lied when he said Tom killed Bill. Jack is the only one of us who owns a gun. Tom and Bill were pals. Tom: I never fired a gun in my life. I don't know who did it. Joe doesn't own a gun. I never saw Bill until they showed me the body. Who killed Bianchi?