(CNN) Charles Rhines, who was convicted of murder in the brutal stabbing of a 22-year-old man in 1992, was executed in South Dakota Monday, the state's attorney general said, after the Supreme Court denied a last-ditch appeal of his case.

"I am hopeful that this day is an opportunity for the family to move forward and now, that this phase is over, they can continue to heal," South Dakota Attorney General Jason R. Ravnsborg said in a statement.

Rhines died by lethal injection, the attorney general said. He offered no apology before his death.

When he was asked if he had anything to say, Rhines turned to the parents of his victim for his last words.

"Ed and Peggy Schaeffer, I forgive you for your anger and hatred towards me," he said, according to the Rapid City Journal newspaper. "I pray to God that he forgives you for your anger and hatred towards me"

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