RedactedNarrative: OPERATOR OF THE BOAT WAS HAVING MECHANICAL ISSUES WITH THE MOTOR.  THE BOAT WAS DRIFTING TOWARDS LOCK AND DAM #3 AND WAS GETTING CLOSE TO THE ROLLER GATE ON THE WISCONSIN SIDE.  THE VICTIM PANICKED AND STATED HE WAS GOING TO JUMP INTO THE RIVER AND SWIM TO SHORE.  WHEN THE OPERATOR GOT THE MOTOR STARTED HE TURNED AROUND AND VICTIM WAS NO LONGER ON THE BOAT.  THE VICTIM WAS OBSERVED BY A WITNESS TO BE HOLDING ON TO THE VERTICAL METAL PYLON ON THE WISCONSIN SIDE, BEFORE BEING PULLED TOWARDS THE ROLLER GATE AND UNDER WATER.  THE VICTIM NEVER RESURFACED.  AT THIS TIME THE VICTIMS BODY HAS STILL NOT BEEN RECOVERED, BUT IS PRESUMED TO HAVE DROWNED ON THE WISCONSIN SIDE OF THE MISSISSIPPI RIVER NEAR THE ROLLER GATE.