BOONE, Iowa—Boone County Sheriff Ron Fehr says his department is investigating a theft of copper from a warehouse facility in the Boone Industrial Park.  Fehr says the complaint was received from PDM about 10:30 Thursday morning.  Someone had entered a warehouse, cut out the copper and hauled it away.  It was estimated to weigh about a ton.  Fehr says evidence was collected and the investigation is on going.