The Mason County Prosecutor has announced charges have been filed against two individuals alleged to have been involved in the death of Michigan State Police Trooper Paul Butterfield.

Prosecuting Attorney Paul Spaniola has charged Sarah Renee Knysz, 20, of Luther with two felonies - Accessory After the Fact to the Murder of a Michigan State Police Trooper and Unlawful Driving Away of an automobile. Both counts are punishable by up to five-years in prison and Accessory After the Fact could include up to a $10,000 fine.

Eric John Knysz, 19, of Luther will be arraigned on his charges once he is returned to Mason County. The four count complaint against him includes Homicide-Murder of a Peace Offcier, Felony Firearm, Carrying a Concealed Weapon and Unlawful Driving Away of an Automobile. He faces life in prison without parole.

The Manistee County Prosecuting Attorney is also reviewing the investigation for crimes which may have been committed by the suspects during the course of their apprehension in Manistee County. The Lake County prosecutor is also exploring potential charges.