RedactedNarrative: The County Sheriff's Office was advised, at 1943 hours, of an unoccupied fishing boat under power driving in circles in the lower end of Weaver bottoms on the Mississippi River. They tried contacting the registered owner and did not make contact. They were able to make contact with the owner's son. He said his father was pre-fishing for an upcoming tournament and had left his residence where he docks the boat at 11:15 a.m. to fish. He was by himself. The son had checked on his father's location by his phone at 5:15 p.m. and he was where he should have been in the lower portion of the Weaver bottoms. He said his father was overdue and had not returned. The deputies talked to the man who found the circling boat. He said he was fishing in the same area and saw the boat doing circles with it's trolling motor. He approached and saw it was unoccupied. He tied up to the boat and unplugged the trolling motor as he couldn't turn it off. He anchored the boat. He said the seats were up and the trolling motor was on "full blast" before he unplugged it. When the motor was plugged back in and played with, it didn't work.  A life jacket was found in the boat. The operator was found at 2120 hours, in about 4.5 feet of water, using a drag bar. The incident was unwitnessed. It is unknown what time or how the operator entered the water. Alcohol was not a factor.