The last three of 13 federal defendants in a tax fraud and stolen identity scheme centered in Statesboro pleaded guilty last week. Porsche Pinkney, Tidaesha V. Taylor and Gregory F. Smith entered guilty pleas as they stood before United States District Court Judge B. Avant Edenfield in federal court in Statesboro, according to the U.S. District Attorney's Office. Since March, 10 others involved in the tax and identity fraud scheme have pleaded guilty as well.