The Tennessee Supreme Court Ruled That The State’s Written Protocol For Carrying Out Lethal Injections Is Constitutional. The Court Upheld The Order That Was Being Challenged By 33 Death Row Inmates Including Nikolaus Johnson, The Man Convicted Of Killing Bristol, Tennessee Police Officer Mark Vance In November 2004. The Suit Said The Drug Pentobarbital Created A Substantial Risk Of Serious Harm And Lingering Death.