RedactedNarrative: On 07/20/2013, at about 4:23 p.m., this vessel was cruising on Lake Sammamish within the City of Issaquah located in King county WA. The operator was towing her teenage children and their friends in Lake Sammamish. The weather was warm with little to no wind. Other boats on the lake made waves that could be described as light chop. Operator was towing two tubes at the same time - one with 3 persons and one with 2 persons. No unusual waves or events occurred during the day's activities. She made several trips towing different children. 
  
  On this particular tow trip when she returned to her water front dock she noticed the victim, Victim, looked unusual and was shivering. Although Victim wanted to keep being towed on the tube, Operator had him take a turn in the boat. As they left the dock for another trip with the towed tubes, Victim continued to shiver. To help him warm up, Operator turned on the boat heater and covered him with towels. Moments later Victim lost consciousness. 
  
  A King County Officer interviewed Victim at the hospital. Victim told the officer that his life jacket was strapped on very tight, and another rider on the tube with him was holding the hand grip on the far side, by reaching across and over his back. This caused weight and constant pressing down on him while they were riding. Victim also said that it felt like someone's head was constantly banging into his chest making it hard to breath. 
  
  The officer interviewed two other riders who were riding on the tube with Victim. Neither of them were ever under Victim or banged into him. Other occupant confirmed he was holding on to the grip by reaching across Victim. 
  
  The general thought is the pounding Victim felt on his chest was from the moderate waves interacting on the bottom of the tow tube while they were underway. The officer inspected the PFD Victim was wearing during his ride. The PFD was rated for 90# and under and was in good condition. This was an appropriate PFD for the activity and proper size for Victim. 
  
  One injury - No fatalities 
  There was no apparent alcohol involvement. 
  There was no vessel damage reported. 
  All individuals were wearing PFDs. 
  The operator did not have a mandatory Boater Education Card. 
  There were no Rules of the Road Violations.
NameOfBodyOfWater: Lake Sammamish
NearestCityTown: Issaquah