A Minnesota man in his 70s was found dead in Pierce County, Wis., on Tuesday after he had been missing for a week. Michael William Robinson, 77, was first reported missing near Prescott Island on the evening of July 28, according to the Dakota County Sheriff’s Office. Ground and water searches initially uncovered Robinson’s unoccupied boat near the island, the sheriff’s office said. His body was found about a week after he was reported missing. Our hearts are with Michael’s family and loved ones during this incredibly difficult time,” Dakota County Sheriff Joe Leko said.