Execution of Dennis McGuire
The death of Dennis McGuire occurred on January 16, 2014, at the Southern Ohio Correctional Facility in Lucasville, Ohio, in what was considered to be a botched execution. McGuire was executed via lethal injection using a new combination of untried and untested drugs: midazolam and hydromorphone.
Source: Wikipedia — Execution of Dennis McGuire (CC BY-SA 4.0)