Green pleads not guilty in Sac City murder

SAC CITY – A Georgia man accused of killing a Sac City man almost five years ago pleaded not guilty to the charge Thursday.

John D. Green, 54, of Blairsville, Ga., made the written plea via his Fort Dodge attorney, Charles Kenville.

No trial date had been scheduled as of Thursday afternoon, according to online court records.

Green is facing a first-degree murder charge for the June 2009 death of Mark Koster, 58, of Sac City.

Koster was reported missing by his family in 2010 after they hadn’t heard from him in several months.

He “had a propensity to just pick up and leave,” according to Sac County Attorney Ben Smith.

Koster’s skeletal remains were found buried in his basement at 610 N. Fifth St., Sac City, in November 2012 after the house had been sold and the new owner was cleaning.

Interviews with family and friends led to Green being identified as a potential suspect. The pair had once been coworkers at a convenience store during the 1980s and Green briefly lived in Koster’s house in 2009.

Green was arrested on March 24 in Orange Park, Fla.

He admitted to killing Koster during an interview with law enforcement there, according to Smith.

Green was brought back to Iowa five days later after waiving extradition.

He is being held in the Sac County Jail without bond.