Another Kentucky death row inmate is challenging lethal injection.
Gregory L. Wilson says that giving an inmate the drug Valium interferes with the lethal three-drug coctail.
He also claims that inmates cannot make an intelligent choice between lethal injection and electrocution because the state does not provide enough information for each method.
Wilson's challenge is at least the third in Kentucky.
The US Supreme Court has scheduled arguments in January in the case of his fellow death row inmates, Ralph S. Baze and Thomas Clyde Bowling.