RedactedNarrative: Boat was purchased on 6-22-17 by owner. Owner and two passengers were on the boat saturday night when they struck a buoy while heading south from stillwater on the st croix river. The buoy's cable was subsequently wrapped around the port engine prop shaft. The boat was beached at high line beach (st croix yacht club) for the night on the south side, west of the channel.
  
  On sunday, a concerned citizen requested a welfare check on the boat as the person did not recognize the boat being on this beach before and had not seen any activity on the boat. A concerned friend also requested a welfare check on the boat as no one had been able to contact the owner or female passenger. 
  
  Washington county deputies were first on scene. The camper enclosure was up, and closed, all hatches and ports were closed and the generator was running. The transom door was open and the transom canvas was unzipped. Deputies announced themselves with no response. They made entry onto the boat from the stern and observed a male down below in the cabin on the floor. The door was partially open to get down below. This male was the owner/operator and was unconscious. Another male passenger was on the bed underneath the helm and a female passenger was on the same bed lying behind the male passenger. The male passenger was semi-conscious. The female passenger showed lividity and was obviously deceased. Deputies removed the owner/operator and male passenger from below, turned off the generator and all switches from the control panel down below, opened hatches, ports and the canvas. No drugs were found on the boat. Alcohol was known to be consumed saturday night. 
  
  There was a carbon monoxide detector on the port side of the bed where the female and male passengers were sleeping.  This detector was on the "off" position. 
  
  The owner/operator and the male passenger were transported to hennepin county medical center. The male passenger was listed in satisfactory condition and was later released.  The owner/operator was listed in critical condition. 
  
  Wdnr officer towed the boat back to hudson marina where it was tied to "a" dock and was watched by st croix county deputies continuously. 
  
  Autopsy results were 63% blood carbon monoxide on the female passenger. Cause of death was ruled carbon monoxide poisoning, accidental. 
  
  The boat was inspected by a trained westerbeke generator technician from bayport marina. They found the generator was working properly with no exhaust leaks. The wdnr officer attempted to recreate the scene placing the hatches, port holes and canvas in the same position the boat was found. Using 2 separate carbon monoxide detectors, the generator was started and allowed to run. Carbon monoxide levels never exceeded 15ppm in the engine compartment. In the cockpit area, the highest readings reached was 350ppm. The generator ran for approximately 25 minutes. 
  
  The generator exhaust outlet is out the transom underneath the swim platform. Readings would spike when wind would blow across the swim platform and the transom canvas door would blow into the cockpit area causing a backdraft. 
  
  The carbon monoxide detector was inspected. When the switch was turned on, nothing happened. The dc main rocker switch had to be turned on in order to power the carbon monoxide detector. With the dc main switch on, the wdnr officer switched the carbon monoxide detector on and the detector turned on, beeped and the light was green. The wdnr officer pressed and held the test switch and it beeped continously like a smoke detector. The carbon monoxide detector looked to be the original one installed on the boat. Unknown if or when the detector would make an alarm to carbon monoxide levels. This was not tested due to the detector being found in the off position and the dc main switch was found in the off position providing no power to the detector. 
  
  The owner/operator was released from the hospital. Unknown if there will be any long term brain effects. The owner/operator has lost feeling in some of his extremities, walks with a cane, wears a boot to help with blood flow, has carbon monoxide "burns" on his body and lost a lot of hair.