A man convicted of killing his former lover and her husband in what prosecutors called a fit of rage has been executed in Missouri.

A Missouri inmate who is weeks away from execution is in a hospital after suffering what a Missouri Department of Corrections spokeswoman described as a “medical emergency."

Witnesses watched through a window at an Alabama prison as Kenneth Eugene Smith became the nation's first person to be put to death using nitrogen gas.

A man put to death using nitrogen gas shook and convulsed on the gurney as Alabama carried out the first-of-its-kind execution that once again placed the United States at the forefront of the debate over capital punishment.

Alabama has executed a man with nitrogen gas, putting him to death with a first-of-its-kind method that once again put the U.S. at the forefront of the debate over capital punishment.

An Oklahoma death row inmate scheduled to be executed in September for the 1996 killing of a University of Oklahoma dance student says he plans to reject his chance for a clemency hearing.