A man who shot and killed two Missouri prison guards almost 23 years ago in a failed bid to help an inmate escape is set to be executed this evening.
42-year-old Michael Tisius has been scheduled to die by lethal injection at the state prison in Bonne Terre for murdering officers Leon Egley and Jason Acton on June 22, 2000.
The execution is set to be carried out after much debate, including Tisius' own lawyers urging the US Supreme Court to block the execution.