Use of drug cocktails in US executions

Calls for halt to death penalty after botched execution

New cocktail of drugs blamed for slow death of Oklahoma inmate Clayton Lockett

Woman in last-minute appeal to avoid Texas execution

Susan Basso (59) to die by leathal injection for role in death of mentally disabled man she let on she would marry

Shortage of lethal drugs in death-row states

Some states propose bringing back firing squads or the electric chair

Ohio executes convicted killer using new two-drug method

Dennis McGuire (53) executed for the 1989 rape and murder of a pregnant woman