RedactedNarrative: Officer notified of a possible carbon monoxide incident that had occurred on a boat off of washington island. Two individuals had been transported to door county medical center for treatment. Upon responding to the medical center officer was advised that three additional victims were being transported for treatment of carbon monoxide poisoning. Upon meeting with one of the passengers, officer was advised that the seven individuals were riding on a boat off of boyers bluff near washington island when the youngest had gone down to the salon area of the boat for some snacks. Passenger advised that the youngest was only down below 30 seconds to a minute and began convulsing. 
  
  Upon initial treatment it was determined that there were elevated carbon monoxide levels with these two passengers (15-22%). Upon speaking with the three other individuals who were transported they all told similar events. Upon inspection of the boat the following day it was determined that the rear canvas of the boat had been removed during the boating trip, causing a low-pressure event in the cabin of the boat (station wagon effect) since the forward ventilation hatch was not opened as recommended. 
  
  Further inspection revealed a small crack in an exhaust manifold of the starboard (right) engine along the right side of the engine. A co meter was also used and determined a slight leak in the exhaust system of the port (left) engine was also occurring. Carbon monoxide levels were 15-16% in the engine compartment at idle after approximately 15 minutes. Neither of the two carbon monoxide detectors that the boat is equipped with were functional as indicated by statements of the boat owner.
  