Paul T. Butterfield, the father of slain Michigan State Police Trooper Paul K. Butterfield II reads a statement in court during the sentencing of Eric Knysz on April 8, 2014. His wife Pat Butterfield is standing next to him. Knysz was sentenced to life in prison with no chance of parole by Mason County's 51st Circuit Court Judge Richard I. Cooper in Ludington, Mo. Knysz was convicted on February 25, 2014 of killing Butterfield during a routine traffic stop on September 9, 2013 in rural Mason County. (AP Photo/The Muskegon Chronicle, Ken Stevens)
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