RedactedNarrative: On August 6, 2018, Victim and his passenger were fishing on Kincaid Lake around 2:15 a.m.  Victim was maneuvering his vessel (LA 2434 FW) using his electronic trolling motor, when he mentioned to Subject that he felt a sharp pain in his groin area.  Subject asked if he was okay or if he needed to take any medication, in which Victim replied that he was okay.  A short time later, Subject stated that Victim slumped over while he was working the trolling motor and then fell in the water.  Subject was able to get to the trolling motor and place it in neutral.  He proceeded to grab hold of Victim at the rear of the vessel and keep his head out of the water.  Due to Victim's size, Subject was unable to physically pull him back into the boat.  However, while hanging onto Victim, Subject was able to contact emergency services by phone. Subject estimated that he held onto Victim for about 30 to 45 minutes in the water, before the Sheriff's Office arrived by boat.  Due to Victim's past medical conditions with his heart, it is believed that he may have suffered from a heart attack.  Two type III PFD's were observed laying on the floor of the vessel, but were not in use.  Also alcohol or drug use was determined to not be a factor