LUDINGTON — UPDATED… Probable cause has been found against Eric Knysz, 20, and his wife, Sarah Knysz, both of Irons. Eric Knysz will face four counts in Mason County’s 79th District Court in relation to the shooting death of Michigan State Police Trooper Paul Butterfield. He faces charges of homicide/murder of a police officer; weapons felony firearms; weapons carrying concealed;…