Upon questioning, OPERATOR stated that he and VICTIM were both sitting in the cockpit of the boat, in the driver seat and passenger seat respectively.  OPERATOR also stated that he and VICTIM had been traveling at high speed south, down East Canyon Reservoir and hit a wave or a wake "in a weird way" to quote OPERATOR, that ejected VICTIM into the water.  The wave they hit came from the port bow side.  The boat swung to the starboard side in response, ejecting VICTIM.  OPERATOR stated that he had been ejected from the boat as well by the same incident.  He observed that VICTIM was injured and bleeding severally so he attempted to support VICTIM in the water.  According to the statement collected by Officer from GOOD SAM, GOOD SAM was nearby on his vessel and observed OPERATOR's boat traveling at high speed in circles around the two men.  GOOD SAM and his passengers assisted OPERATOR and VICTIM onto their vessel and began first aid efforts on VICTIM.  GOOD SAM and his passengers called 911 and transported VICTIM to the courtesy docks of East Canyon State Park.  On further inquiry, OPERATOR stated he was able to gain control of his vessel and drive it to the dock which he did. 
While speaking to OPERATOR I could detect an odor of an alcoholic beverage on the breath of OPERATOR and asked if he had been drinking.  He stated that he had and so had VICTIM.  I had OPERATOR blow into a portable breath tester and he registered a .026 BAC, well below the legal limit indicating impairment.  I performed the Horizontal Gaze Nystagmus test on OPERATOR and found no clues.  I observed that OPERATOR displayed no impairment in his manner or bearing and determined he was not under the influence of alcohol at that time.  He did, however, display several indicators of shock and stress.  He was visibly upset over the accident and was shaking and had a green tinge in his face, as well as vomiting and feeling cold.  I attempted, along with another person on GOOD SAM's boat to provide support and water in attempt to help him regain his bearing.  
I was in contact with dispatch during this time and requested that in addition to the ambulance that was enroute, a helicopter from LifeFlight respond to the park as well.  I maintained contact with the helicopter and Officer and I cleared the launch ramp area from vehicles and people to provide a suitable landing zone for the helicopter.  I provided wind speed, direction, and hazard information to the pilot of the helicopter and assisted it in landing by providing reference points.  
Officer spoke to the passengers and witnesses on GOOD SAM's boat and obtained their statements of what had happened.  They explained that all they had seen was OPERATOR's boat running in circles around the two men in the water and had assisted as best they could.  
As a precaution, I confiscated the propeller from OPERATOR's boat as evidence.  I could detect no damage to the vessel or propeller.  

CONCLUSION
According to the statements made by OPERATOR, he was caught unaware of a potential danger in the water in the form of a large wake or wave.  An impact with a large wave, coming from the port bow direction, could result in a sharp right turn, causing a passenger riding in a port side seat to be ejected.  The passenger would then be sucked under the boat to impact the propeller.  However, the driver would have to be inattentive and not holding the steering wheel firmly for such a violent maneuver to occur.  The same incident would not be sufficient to also eject the driver.  Further, it would not explain how the vessel was "out of control" and "running in circles" and then come to a stop with no intervention.  

Based on the statements made, I believe VICTIM was ejected after a violent maneuver on the water, but am unsure as to what caused the maneuver.  After being ejected, VICTIM was struck by the propeller of the boat.  OPERATOR became aware of the accident and throttled to zero and jumped into the water to assist VICTIM.  Because of momentum, the boat continued in a circle around the men and came to a stop.  


ASSESSMENT:
When I arrived VICTIM was laboring to breath and in panic.  I administered oxygen and then assessed his wounds starting with his chest.  A two inch puncture wound was near his heart and bubbling with blood.  The rise and fall of his chest indicated punctured lungs with collapsing chest and irregular movement.  At the direction of GOOD SAM I then checked his neck where a three inch cut was deep but not bleeding profusely.  I packed it with trauma pad to control it.  I checked his under arm on his left side.  The prop had cut deeply into his under arm where a six inch cut revealed mutilated bone, muscle and tissue.  There was no artery bleeding and the location made a tourniquet impossible so I packed it with a second trauma pad and had GOOD SAM continue to hold direct pressure on it.  A blood clot was covering what I believed to be a deep right thigh muscle cut, but unwilling to compromise the benefit of the blood clot I placed another trauma pad over his thigh with direct pressure.
MORGAN                        