Boat 1 was backing to slip with only the operator on board.  While the vessel was backing, the operator moved from inside boat to fly bridge.  During that transfer, his boat hit boat 2 on portside just rear of midship.  Boat 2 was moored and occupants were below deck sleeping.  Owner of boat 2 stated that the operator of boat 1 smelled of overwhelmingly of alcohol and was incoherent.  Owner of boat 2 assisted operator of boat 1 with docking his boat.  Operator of boat 1 attempted to leave by car and refused to provide i.d. information.  Marina security intervened.
Chicago                       