Ms. Dunnit lives next door to Tony, Ilene, Pat and Bob. Sunday evening she got a frantic call from Ilene saying that she and Tony had just returned home from a dinner out and found Pat, lying dead, in a puddle of water surrounded by shattered glass. Irene was certain that Bob had killed Pat, (they hadn't been getting along at all) and when Lt. Hugh Dunnit was called in, he agreed that all of the evidence pointed to Bob. However, Bob was never arrested or prosecuted for the crime. Why not?
E-mail your solution to me (firstname.lastname@example.org) by Saturday, June 7.