RedactedNarrative: Operator was operating his vessel on Rough River Lake in the Cave Creek area on 6/18/2016 around 19:00 CST. Operator was loading the vessel onto his boat trailer, and when he turned the ignition key off, an explosion occurred causing the boat to catch fire, and Operator to jump into the lake.
  
  Operator stated that day he went to Nicks Marina on Rough River Lake around 17:50 CST to get gas. He told the gas hand that he wanted 20 gal of gas, and then left the vessel in the gas slip. Operator and subject1 went into the Nicks Marina store to look around while Gas hand pumped the gas. Operator stated that at some point while in the store, Gas hand asked if he wanted $20 of gas or 20 gallons. Operator replied that he wanted 20 gallons.
  
  Operator returned paid for the gas, and returned to the vessel. He stated shortly after leaving the marina's no wake zone that his vessel was not running correctly. The vessel's motor would die and would not want to crank back over to start. After Operator lifted the cowling of the motor, he said the motor would then start correctly.
  
  Operator stated that he was making his way to the Sandy Beach area on the lake, and on his way, he noticed the floor of the vessel was wet. He stated that when he touched the floor and felt the dampness, it didn't have a gasoline odor, but did not feel like lake water. 
  
  Operator decided that something was wrong when he noticed his gas gauge was not showing the correct level for 20 gallons of gas being added, and that the motor was still not running right. Instead of going to Sandy Beach, he decided to return to Cave Creek boat ramp, where he launched his vessel earlier, and take the vessel to his buddy to see what was wrong.
  
  Once at Cave Creek ramp, Operator unloaded his passenger to pick up his vehicle and trailer. Operator loaded his vessel onto the trailer and when he turned off the ignition switch, he stated that a ball of fire came from cubby area of the vessel and the whole vessel caught on fire. Operator jumped into the lake, which he claimed, he was on fire, and tried to push the vessel away from the boat ramp and into the cove area.
  
  Grayson County Fire, diver, and two Corps Rangers were on scene. Sgt. and I received a call about the boat on fire, and made our way to Cave Creek from the Long Lick Creek area. Once we arrived on scene, the vessel was beached and the fire was extinguished. Grayson County EMS had already transported Operator to Twin Lakes just prior to our arrival. I spoke with one of the Corps Rangers about the incident and he stated that when he arrived, Operator was receiving treatment from the burns, and when he spoke with Operator about the incident he could smell an odor of an alcoholic beverage on his breath.
  
   Inside the brunt vessel was a blue beer can that was untouched by the fire. We gathered the information and assisted with putting the burnt vessel back onto Operator's trailer and the Corps Rangers took the vehicle and vessel to their lot.
  
  Sgt. and I went to Twin Lakes Regional Medical center to obtain more information about the incident. Around 21:30 CST we spoke with Operator and the medical staff attending to his burns. The medical staff stated that Operator had 1st degree burns on his right upper arm, abdomen, and left hand, 2nd degree burns on both of his legs and less than 2% of his bodies surface area had burns. Operator informed Sgt. and I about the incident and guessed that the dock hand at Nicks Marina accidently put the 20 gallons of gas into the septic container instead of the fuel container, which might have cause the fumes to build and ignited the fire when he shut the motor off. Sgt. and I left the medical center around 22:00 CST.