RedactedNarrative: On 06/07/14 at 1220 hours, I was advised by Scorpion Bay Marina employees that there was a medical emergency that was coming into the marina via Marine 16 channel. The victim, a male subject who was later identfied by an Arizona driver license suffered a severe rope burn injury. I advised Scorpion Bay Marina employees to transport the victim to the Scorpion Bay Marina Courtesey dock so that we could evaluate his injuries there. 
  
  Once Vessel #1 arrived at the courtsey dock, I observed that Victim was sitting the back seat of the vessel. There were two other male subjects onboard the vessel with Victim. When I did a brief observation of Victim, I observed that he had several severe rope burns on his left upper leg above the knee, severe rope burns on his right leg below the knee, massive trauma to his left foot above the toes and a large hematoma on top of the left side of his head. 
  
  I contacted MCSO dispatch and advised them to dispatch Peoria Fire Department to the scene. Due to the severity of Victim''s injuries, we also requested that a medical helicopter be dispatched as well. 
  
  I made contact with a male subject who identfied himself. subject said that he did not observe what happened, but stopped to render assistance by helping Victim out of the water, after being waved down by a young male subject who was also onbaord Vessel #1 and who was later identfied as the operator. While Deputy was evaluating Victim injuries, we asked him what happened. Victim was conscience but was confused on what happen. Victim said that he was not sure and did not remember. 
  
  I made contact with Operator on the boat dock and after interviewing him on the dock and later at the Scorpion Bay Marina Operator told me the following: 
  
  Operator said that while he was operating and cruising along the lake onboard Vessel #1 with Victim as a passenger, he heard a loud bang. Operator said that when he looked to see what happen, he observed Victim had fallen into the lake. We later learned that there was a recreational tube on board Vessel #1 with a long rope attached to the tube that was connected to the back of the vessel. After speaking with Operator, we had come to a conclusion that while Operator was operating the vessel and while he was making his way across the lake at a speed of approximately 40 miles per hour according to Operator, the tube flew off the back of the vessel by a gust of wind. When the tube and rope went into the water, the rope got caught in the propeller. The remaining rope that was still on board the vessel wrapped around Victim''s legs and foot and pulled him into the lake. While Victim was being pulled into the lake, he hit his head somewhere onboard the vessel, causing the large hematoma on top left side of his head. 
  
  Peoria Fire Department / B Shift, arrived on scene and after evalutaing Victim''s injuries, made a determination that he would have to be transported via Halo 151 medical helicopter to Jihn C. Lincoln / North Mountain Hospital for serious but non life threatening injuries. 
  
  I later inspected the vessel and the propeller and found that the rope, that was attached to the tube had been severed. There was not any remnant of the rope lodged in the housing of the propeller. I took digital photographs of both the vessel and the propeller (see attached copies). Nothing further. 
  
  Operator''s mother  arrived at the marina office and took Operator home. 
  
  There is nothing further.