"The cops will never suspect me," Pat thought, as he tiptoed to the living room carrying a heavy iron skillet.  One whack and his murderous plan would surely pan out.  Mike his brother, would be sitting where he sat every night, in his favorite chair, falling asleep, in front of the TV.  Killing him would be easy and foolproof.  A week later, alerted by a concerned neighbor, police broke into the apartment and found the bodies.  Both men were in the living room.  Mike dead in his chair, his head severely dented.  Pat, in another chair, just as dead.  A piece of paper was on the coffee table.

Why did Pat think he could get away with murder and what happened that fateful night?