A Sparta man who pleaded guilty in October for homicide by negligent operation of a vehicle was sentenced Monday afternoon. Monroe County Judge Mark Goodwin sentenced 25-year-old Channing Mathews to five years in prison and five years on extended supervision. In March 2015, Mathews lost control of his vehicle on Highway 71 in Monroe County. It rolled and wrapped around a tree. Mathews’ passenger, Ryan Johnson, died instantly. He was 26.