Crashed into Tennessee River and sank without trace. Pilot was only one on board and is missing presumed drowned. Haverfield Aviation confirmed it to be one of their helicopters and some debris from it found further downstream was labelled with the company name. Nearby angler witnessed the helicopter crashing into the water around 1pm. The search for the helicopter was stood down later due to lack of visibility in fog. Pilot later named as Abraham Bronn