RedactedNarrative: THE BOAT WAS BEING OPERATED APPROXIMATELY 100 YARDS AWAY FROM SHORE WITH 8 OCCUPANTS. PASSENGER 7 AND PASSENGER 4 LEFT THE BOAT TO SWIM. PASSENGER 7 AND PASSENGER 4 GRABBED ROPES ATTACHED TO THE BOAT (USED FOR TYING TO A DOCK) AND WERE BEING PULLED THROUGH THE WATER AT A VERY SLOW PACE (BELOW SLOW NO WAKE). THE BOAT OPERATOR PLACED THE BOAT IN NEUTRAL AND PASSENGER 4 SWAM BACK TO THE BOAT AND BOARDED. PASSENGER 7 REMAINED IN THE WATER TO CONTINUE SWIMMING. AT THIS TIME, THE OCCUPANTS OF THE BOAT OBSERVED PASSENGER 7 LET GO OF THE ROPE AND START TO GO UNDERWATER. PASSENGER 7 DID NOT APPEAR TO BE IN DISTRESS OR STRUGGLE. PASSENGER 7 DID NOT RESURFACE AND WAS RECOVERED APPROXIMATELY ONE AND HALF HOURS LATER BY A DIVE TEAM. PASSENGER 7 WAS PRONOUNCED DECEASED AT HOWARD YOUNG HOSPITAL IN WOODRUFF, WI AT APPROXIMATELY 11:18PM. PASSENGER 7 HAD BEEN DIAGNOSED WITH EPILEPSY AND HAD A HISTORY OF SEIZURES. ESTIMATED TIME OF DEATH BY MEDICAL EXAMINER WAS 8:32PM. PRONOUNCED TIME OF DEATH WAS 11:15PM. NOTE: THERE WERE NO APPLICABLE CONTRIBUTING FACTORS (MEDICAL EMERGENCY).