SAC CITY - John D. Green has made a written plea of not guilty to first-degree murder.
Green, 54, of Blairsville, Ga., is accused of killing Mark Koster, 58, of Sac City, during the summer of 2009.
Koster's body was found buried in his basement in November 2012.
Investigators identified Green as a suspect and arrested him in Florida on March 24.
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