Tennessee Criminal Appeals Court Justices Are Hearing Arguments In The Case Of A Bristol Man Convicted Of Killing A Police Officer In 2004. Attorneys For 39 Year Old Nikolaus Johnson And The State Gathered In Knoxville As Post-Conviction Procedures Move Through The Court. A Sullivan County Jury Convicted Johnson Of First Degree Murder In The 2004 Death Of Bristol Police Department Officer Mark Vance. He Was Originally Sentenced To Death But Received A Stay Of Execution In 2014. Johnson Remains Incarcerated At The Riverbend Maximum Security Institution In Nashville.