“At least, if your will is as you say, it proves definitively that I couldn't be the murderer." Nick put on an exaggerated expression of relief. "I was beginning to worry."
"I'm happy to set your mind at ease, Nick, old boy, but I must admit I've long held you above suspicion in this case."
"Really?"
"Oh, by all means. Obviously our murderer is of superior intelligence and nerve. I ruled you out from the start.”