RedactedNarrative: On Friday, June 7th 2019, sunject2 and subject were swimming in Nina Cove on Douglas Lake in Jefferson County Tennessee. According to Subject, they left Fancher''s campground in subject2''s pontoon boat (V1) around 1140. They drove over to Nina Cove, stopped the vessel, and they both jumped in the water to swim at approximately 1200. 
  
  According to Subject and two other witnesses the pontoon boat (V1) started to drift away. They both tried swimming back to the vessel (V1) when Operator went under. Subject stated his face was purple when he went under and he never resurfaced. I arrived on scene at approximately 1230. I used side scanning on my patrol boat''s sonar in attempt to locate Operator. Myself and other officers searched until approximately 2330 using the Under Water Robot. On June 8th 2019, Operator’s body resurfaced and was recovered by rescue squad units at approximately 0730. Operator’s body was transported to Jefferson County Memorial Hospital. I met with the medical examiner there, where he drew a blood sample that was sent to TBI for a toxicology report. The medical examiner deemed the cause of death to be a drowning with heart disease as a co-factor.