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      Knysz sentenced to life in prison for trooper's murder

      Eric Knysz has been sentenced to life in prison for the September 2013 shooting death of Michigan State Police Trooper Paul Butterfield.

      A 20-year-old man convicted of first-degree murder for fatally shooting a Michigan state trooper during a traffic stop has been sentenced to life in prison without the possibility of parole.

      Eric Knysz received the mandatory penalty under Michigan law Tuesday in Mason County Circuit Court in Ludington.

      A jury found him guilty in the September slaying of 43-year-old Trooper Paul Butterfield II.

      Prosecutors say Knysz had stolen guns with him when Butterfield pulled over his pickup truck in western Michigan.

      Before getting the sentence, Knysz made a brief apology to Butterfield's family and said he's had drug, alcohol and anger-management problems.

      His wife Sarah received a sentence of two to five years in prison as an accessory after the fact and testified against him.