A Man Sentenced To Life In Prison For The 2014 Murder Of Donald Ray Gunter In Greene County Is Asking For A New Trial. 42 Year Old Mario Donte Keene Was Convicted Of Four Counts Of First Degree Murder, Along With Especially Aggravated Burglary, And Especially Aggravated Kidnapping. In Addition To Life Behind Bars, A Judge Sentenced Keene To 25 Years Each For The Other Two Felonies. Gunter Was Killed At His Old Mountain Road Home. A Defense Motion For A New Trial For Keene Will Be Heard On February 3rd.