RedactedNarrative: OPERATOR AND OCCUPANT OF VESSEL ONE WERE CRUISING WHEN THEY NOTICED THE VESSEL TAKING ON WATER.  THE OPERATOR STOPPED THE VESSEL AND WENT TO FIND THE SOURCE OF HOW THE WATER WAS GETTING IN TOWARDS THE STERN.  VESSEL ONE THEN BECAME OVER TAKEN WITH WATER OVER THE TRANSOM CAUSING VESSEL ONE TO OVERTURN TO THE STARBOARD SIDE.  THIS CAUSED BOTH THE OPERATOR AND OCCUPANT TO BE EJECTED.  THE OPERATOR OF VESSEL ONE WAS NOT WEARING A PFD AND DROWNED.  UPON INSPECTION IT WAS DISCOVERED THE LIVE WELL PUMP DID NOT WORK AND THAT THERE WERE HOLES THAT ALLOWED WATER TO ENTER AND DRAIN UNDER THE FLOOR BOARDS.  OCCUPANT CONFIRMED THEY WERE AWARE OF THIS.