A 50 year old Des Moines man was sentenced to 15 months in jail for the theft of walnut trees from public land in Iowa, including Corp of Engineers land at Lake Red Rock. The U.S. Attorneys Office for the Southern District of Iowa says that Randall Todd Walker illegally removed 32 Black Walnut trees from the properties. Walker will also serve 3 years of supervised release after his prison term, and will pay restitution in the amount of $56,000.