Five Cass County, Iowa, residents were arrested Friday for conspiracy to distribute fentanyl, according to the Department of Justice.The five arrested on federal indictments were 19-year-old Mason Blaine Loudermilk of Atlantic, Iowa; 28-year-old Chase Daniel Jahnke of Lewis, Iowa; 26-year-old Kelsi Marie Thurman of Lewis, Iowa; 25-year-old Colby Ray Clarken of Atlantic, Iowa; and 19-year-old Collin Jacob Clarken of Atlantic, Iowa, according to court documents.The arrests were the result of a six-month investigation into fentanyl overdose cases in Cass and Shelby counties, the Department of Justice said.According to the Department of Justice, the investigation found a fentanyl distribution system in western Iowa and eastern Nebraska.The five people charged face a potential sentence of a minimum of 20 years up to life in prison, according to the Department of Justice.The investigation into the distribution network remains ongoing, according to the Department of Justice.More headlines