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New trial date set for man accused of killing friend, hiding body in basement

New trial date set for man accused of killing friend, hiding body in basement

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A new trial date has been set in the case of John David Green, accused of killing longtime friend Mark Koster and leaving the body in a basement where it wasn’t found for three years.

The new trial is set to begin March 30, 2015. Green is charged with first-degree murder in the 2009 death of Koster of Sac City, Iowa.

The new trial date was scheduled after District Court Judge Gary McMinimee declared a mistrial on Tuesday. A trial began Monday with jury selection but ended Tuesday after a defense attorney objected to a statement made by Sac City Police Chief John Thomsen.

In his testimony, Thomsen referenced “bad people” when discussing the questioning of Green. The defense argued the comment was in reference to Green. The prosecution contended it was a general statement, but the judge declared a mistrial.

Green told investigators that he killed Koster after Koster attacked him with a baseball bat. Green was staying at Koster’s Sac City home at the time. Defense attorneys say Green acted in self-defense.

Green hid the body in the basement and fled to Mississippi a few days later. Koster was later reported missing. The new homeowner was remodeling when he discovered Koster’s remains in 2012.

Contact the writer: 402-444-1310,

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