A botched execution in Oklahoma reignites the death penalty debate.<br/> <br />Inmate Clayton Lockett died more than 40 minutes after receiving a lethal injection.<br/> <br />Tulsa television reporter Tess Maune was in the viewing room.<br/> <br />She said the procedure started at 6:23 and went on longer than it was supposed to.<br/> <br />(SOUNDBITE) (English) TESS MAUNE, REPORTER FOR NEWSON6, WHO WITNESSED THE EXECUTION, SAYING:<br/> <br />"And then at 6:38, that's when his body really started convulsing, his upper body shaking pretty dramatically, and that's when he clenched his teeth."<br/> <br />Officials halted Lockett's execution after 13 minutes. They say he later died of an apparent heart attack.<br/> <br />Oklahoma was using a new cocktail of chemicals.<br/> <br />The state Supreme Court had said the state provided enough information about the drugs to allow the execution.<br/> <br />Now critics are lashing out.<br/> <br />Diann Rust-Tierney is the executive director of the National Coalition to Abolish the Death Penalty.