RedactedNarrative: Operator smelled of alcohol and had 6 clues of impairment.  The result was positive for alcohol at 2023 hrs.  No further field sobriety tests were administered due to injuries sustained.
  
  They stated that the vessel had struck a canyon wall somewhere in Moki Canyon and that OPERATOR1 had subsequently driven the vessel to the nearest shore area where he could beach the vessel.  They stated that subject had seen them beached and OPERATOR1 had signaled him for help, which he provided while his wife boated out to the mouth of Moki Canyon to call for help on their marine band radio.  
  
  They informed me that due to VICTIM1 being trapped under the passenger side dash and OPERATOR1 stating he had been driving when the accident occurred and after the accident occurred to reach a safe beach, that OPERATOR1 was the operator of the vessel.  Ranger informed me that OPERATOR1 stated to him that he had drank multiple beers that day.  The NPS Rangers were requesting that I take over the accident investigation and the possible DUI investigation.  I agreed to do so.
  
  I then responded to the Bullfrog clinic and inquired with the clinic staff if they would examine operator for any immediately threatening injuries and inform me if he needed immediate treatment for this injuries or if I could continue my investigation with him before receiving treatment. The clinic staff informed me that he had no injuries in immediate need of treatment so I escorted OPERATOR1 into the Bullfrog Holding Facility. I informed him that based on his statements to NPS Rangers that he had consumed alcohol that day, the fact that he drove his vessel into a canyon wall, that he had shown that he was impaired on the Horizontal Gaze Nystagmus test conducted by NPS Ranger, and that the PBT test had shown a positive result for alcohol, I believed he had been under the influence of alcohol when he had been operating the vessel and struck the canyon wall. At approximately 2057 hrs I placed OPERATOR1 under arrest for DUI in the Bullfrog Holding Facility. Operator was placed into handcuffs and then searched.
  
  It is estimated the operator’s BAC was between 0.106 and 0. 114 at the time of the accident when he was operating the vessel.
  
  I asked OPERATOR1 a few questions regarding my investigation of the boat accident. I asked him if he had any trouble with the steering on his vessel that day or anytime prior and he stated he had not. I asked him where in Moki Canyon he had been when he struck the canyon wall. He stated he had been back in the first left fork off of the main Moki Canyon (on left when back into Moki) and was driving he vessel back out of that fork toward the main channel of Moki Canyon, planning to exit Moki Canyon. He stated before he got out of that fork he had struck the canyon wall and then he had driven the vessel to a rock pile where the NPS Rangers had come in the main part of Moki Canyon, just inside of the mouth of the Canyon, to make sure it didn't sink.
  
  I informed OPERATOR1 of the results of the test and finger printed him. I then placed OPERATOR1 into a holding cell to wait the arrival of some of his family members that were planning to come to the clinic. At approximately 2200 hrs I had OPERATOR1 and his father complete an agreement to accept responsibility for an arrested person form and then released OPERATOR1 to his father. I had OPERATOR1 sign his citation and served him with a copy of it. I informed him of his right to a hearing with the Driver License Division. I released his property back to him that was taken when he was searched.