RedactedNarrative: On 06/16/15 an auxiliary sail boat known as Vessel 1 (V1) was operated by Operator 1 (O1) on Lewis and Clark Lake in Yankton County, South Dakota. Three passengers (P1, P2 and P3) were on board V1. O1 and passengers were not wearing Personal Flotation Devices (PFD's).
  
  At approximately 10:04 PM O1 maneuvered V1 into a leased boat slip at the marina. V1 was not under sail and powered by propeller. V1 was taken out of gear and came to a stop inside the slip with anchored docks on the starboard and port sides as well as off the bow. Wooden steps were on the dock on the port side of V1. O1 was behind the controls of V1. P1 was standing on the port side of V1. P2 was standing in the center-port side of V1. P3 was standing on the starboard side of V1.
  
  P1 stepped off the port side of V1 and onto the wooden steps to attach the dock line to V1. P1 lost his balance on the steps and fell into the water near the dock and V1. O1 witnessed P1 enter the water. P3 did not witness P1 enter the water but felt P1's weight shift off V1. O1 grabbed the throw-able device off V1. O1 and P3 watched and P1 did not re-emerge from the water. O1 entered the water and attempted to locate P1 but was unsuccessful. P2 immediately contacted the Sheriff's Office (SO) via cell phone to report the incident. P3 searched the water from the dock.
  
  Wildlife Conservation Officer (WCO), Search and Rescue (SAR) and Emergency Medical Services (EMS) were contacted. WCO arrived on scene at 10:19 PM. WCO contacted O1, P2 and P3 on scene. O1 was standing inside V1 upon WCO's arrival. P2 and P3 were standing on the dock next to V1. P2 showed WCO where she believed P1 entered the water. WCO observed some floating debris in the water at this location. The debris had likely been washed off the nearby dock when P1 fell into the water. WCO observed small bubbles rising through the water column at this location. WCO and others attempted to use a pole to search the water column.
  
  WCO made sure V1 was secured to the dock. O1, P2 and P3 were still not wearing PFD's. WCO escorted O1, P2 and P3 off the docks and arranged for their information to be collected.
  
  SAR arrived on scene 10:26 PM. SAR set up a dive team and entered the water where P1 reportedly entered. At 10:54 PM SAR located P1's body submerged under the water in this location. P1 was brought to the surface and lifted onto the dock. SAR initiated CPR on P1. P1 was moved to the ambulance and taken to the nearest medical facility by EMS.
  
  WCO surveyed and photographed the scene. WCO located a plastic bag with empty beer cans hanging on the steering column of V1. Four can koozies were visible inside V1 one of which held an alcoholic beverage.
  
  Proper navigation lights were displayed on V1 at the time of and after the incident.
  
  P1 was pronounced deceased by the county coroner. Chemical analysis showed P1 had a blood alcohol content (BAC) of 0.082.
   