Who Broke the Window Solution

Solution: The note said ? (question mark) Yarnover - so he knew he should question Mark!

One summer night, Lt. Hugh Dunnit was in living room watching an old episode of Dragnet on T.V. All of a sudden a rock came crashing through his window, breaking it. Lt. Dunnit got up and looked out the window just in time to see three neighborhood kids who were brothers run around a corner. Their names were John Yarnover, Mark Yarnover and Paul Yarnover. The next day Lt. Dunnit got a note on his door that read "? Yarnover. He broke your window." Which of the three Yarnover brothers should Hugh Dunnit question about the incident?

Send your answer to me (grammieknits@yahoo.com) by midnight on Saturday, August 2.