RedactedNarrative: Operator of Watercraft #1 stated that his friend was with him fishing and they moved to a different location with the boat. The victim, who was sitting in an unstable plastic lawn chair in the boat, tipped over off the back of the boat. The operator, along with another fisherman who was close by, tried to throw PFDs and rope to the victim, but he could not get them. The victim then went under the water and never resurfaced. The sheriff's office along with MN DNR conservation officers, Federal Wildlife, and Red River Water Rescue searched for the victim. At 1900 hours the victim was located and retrieved from the water with an underwater robot.