![Man who killed Trooper Butterfield is dead](http://www.oceanacountypress.com/wp-content/uploads/2014/04/knysz_trooper_murder_trial_2-230x300.jpg)
LANSING — Eric Knysz, the 20-year-old Irons resident who killed Michigan State Police Trooper Paul Butterfield, is dead. According to the Michigan Department of Corrections, Knysz was removed from life support at 10:30 a.m. Thursday while housed at Allegiance Health Hospital in Jackson. Knysz hung himself with a bed sheet Monday at the Charles E. Egeler Reception and Guidance Center…