RedactedNarrative: On Saturday, August 11th, 2018, at approximately 8:02 A.M. Wilmette Fire Department received a 911 call about a boat explosion inside Wilmette Harbor. Information collected from Injured persons and witnesses describes the incident as follows.
  
  At approximately 7:10 A.M., Operator and Subject undocked Operator''s boat "Scorpion'' and drove down to the gas dock to fuel the boat. Receipts show fueling at approximately 7:15 A.M. After fueling the vessel approximately 90% of the way, Subject and Operator then washed down the vessel for approximately 20-30 minutes. Once completing the washdown of the boat, Subject stated he was walking on the Gas dock to put the garden/washdown hose back into the building. Operator was beginning the starting sequence for the boat. As Subject was walking away from the vessel he remembers hearing one engine start without issue. He then recalled a loud "clicking noise" which had three distinct "clicks" before a loud explosion. Subject was thrown to the ground with burns and shapnel injuries to his body. 
  
  Operator''s body was located submerged between the two pieces of the hull and superstructure. Operator had traumatic compound fractures to both of his lower legs around the ankle. I am awaiting full autopsy reports for exact cause of death. 
  
  The vessel was removed from the water and transported to a facility in order to be inspected. 
  
  Current examination shows suspect burn damage to wiring located behind the refrigerator inside the cabin. There is also inconsistent burning to wiring throughout the port side of the vessel, from the water heater/engine area to the refrigerator/main breaker panel. Further inspection by a marine engineer would be required to determine exact cause of ignition.
  
  Attached are the photographs from on scene response, wreckage recovery, and inspection after removal from the water. The Illinois State Fire Marshals report is attached. I consulted Illinois State Fire Marshal, in order to attempt to locate the source of the fire. After further inspection, the exact source of ignition was not able to be located by myself or special agent. Even though the console controls show the blower vent switch to be flipped to the on position, it was determined that the explosion was accidental in nature and was caused by a competent ignition source igniting vapor which had accumulated within the hull of the vessel. Special Agent report is attached.
  
  A Marine Surveyor was sent by Operator''s insurance to assess the damage to the vessel. Surveoy surveyed and inspected the vessel under my supervision. A copy of her report is not attached.
  
  Attached toxicology Reports for Operator did not indicate any drugs or alcohol in his system. 
  The attached Medical Examiner''s report states: "Based on the postmortem examination findings and investigation reports, this 67-year-old male died of multiple blunt force injuries due to boat explosion. Drowning is a contributing condition. The manner of death is accident. "
  
  A marine surveyor has been asked to complete an inspection of the damaged vessel in an attempt to locate cause and origin of the fire.
  