Robert Knighton went to the Oklahoma's death chamber Tuesday, and the two Kansas daughters of one of his victims were witnesses. But only one of them felt bad when the lethal mix of drugs was administered.
Sue Norton of Arkansas City, adopted daughter of murder victim Richard Denney, says she felt like a murderer. Norton developed a friendship with Knighton over the years. She visited him in jail and has petitioned for his clemency.
But her sister, Denney's biological daughter, Maudie Nichols of Oxford, Kansas, says Knighton should have payed with his life for the 1990 murders of Richard and Virginia Denney.
Knighton served 17 years in Missouri for manslaughter, kidnapping and robbery.
The execution was at the state prison in McAlester.