RedactedNarrative: DECEASED LAUNCHED V1 AT THE FOREST LAKE LAUNCH AND VEHICLE WAS LEFT LAUNCH AND NOT PARKED IN A SPACE.  FOR SOME UNKNOWN REASON OR CAUSE DECEASED FELL OVERBOARD AND BEING UNABLE TO SWIM (NOTED IN REPORT) WENT UNDERWATER AND NOT TO RESURFACE.  V1 WAS FOUND DRIFTING AND TOWED TO SHORE BY AN ANGLER.