Eric Knysz

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John Knysz looks at the gun that was used in the killing of Michigan State Police Trooper Paul K. Butterfield II during the murder trial for his son, Eric Knysz, in Mason County's 51st Circuit Court Judge Richard I. Cooper in Ludington, Mich. on Monday, Feb. 24, 2014. Eric Knysz is charged with murder in the shooting death of Michigan State Police Trooper Paul K. Butterfield II on Sept. 9, 2013 during a routine traffic stop in rural Mason County. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

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John Knysz listens as he is questioned by Mason County Prosecutor Paul Spaniola as part of the murder trial for his son, Eric Knysz, in Mason County's 51st Circuit Court Judge Richard I. Cooper in Ludington, Mich. on Monday, Feb. 24, 2014. Eric Knysz is charged with murder in the shooting death of Michigan State Police Trooper Paul K. Butterfield II on Sept. 9, 2013 during a routine traffic stop in rural Mason County. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

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John Knysz waits outside the courtroom during jury selection for his son Eric Knysz's trial in Ludington, Mich., on Tuesday, Feb. 18, 2014. Eric Knysz is charged with murder in the shooting death of Michigan State Police Trooper Paul K. Butterfield II on Sept. 9, 2013, during a routine traffic stop. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

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Eric Knysz sits in the courtroom and his attorney David Glancy stands in the background just prior to jury selection for Knysz's trial before Mason County's 51st Circuit Court Judge Richard I. Cooper in Ludington, Mich., on Tuesday, Feb. 18, 2014. Knysz is charged with murder in the shooting death of Michigan State Police Trooper Paul K. Butterfield II on Sept. 9, 2013, during a routine traffic stop. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

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Eric Knysz sits in the courtroom just prior to jury selection for his trial before Mason County's 51st Circuit Court Judge Richard I. Cooper in Ludington, Mich., on Tuesday, Feb. 18, 2014. Knysz is charged with murder in the shooting death of Michigan State Police Trooper Paul K. Butterfield II on Sept. 9, 2013, during a routine traffic stop. (AP Photo/The Muskegon Chronicle, Ken Stevens) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

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