51st Circuit Court News, as of Dec. 11, 2013 By Allison Scarbrough. MCP Correspondent. Accused cop killer’s wife sentenced LUDINGTON – Sarah Renee Knysz, 20, of 1844 10 Mile Rd., Luther, was sentenced to a minimum of two years in prison Dec. 10 for her involvement in the Sept. 9 shooting death of Michigan State Police Trooper Paul Butterfield. Mason…