A Man Convicted Of Killing A Bristol, Tennessee Police Officer Is Seeking A New Trial. Defense Attorneys For Nickolus Johnson Are Trying To Get Sullivan County District Attorney Barry Staubus And Former District Attorney Greeley Wells To Recuse Themselves. They Claim The Two Looked At Information They Were Not Allowed To See. A Jury Convicted Johnson In 2007 For The Officer’s 2004 Death And Sentenced Him To Death. An Execution Date Has Not Been Set.