A fifth suspect has been entangled in the intricate plot to assassinate an Oak Park jeweler and his wife, a scheme allegedly orchestrated to gain control over the couple’s considerable fortune. Phillip Sumpter, 59, of Ohio, was slammed with a charge of conspiracy to commit murder, related to the 2022 killing of jeweler Dan Hutchinson. Details of Sumpter’s involvement in the crime have yet to be illuminated.