The U.S. Supreme Court has denied a rehearing request from Edgar Ray Killen, convicted in 2005 for the 1964 slayings of three civil rights workers in Mississippi.
The justices issued the order Monday without comment.
In November, the Supreme Court declined to review lower court rulings that Killen's rights were not violated during his trial in Mississippi.
Killen, now 88, was convicted of manslaughter in the slayings of Michael Schwerner, James Chaney and Andrew Goodman. He is serving 60 years.
On June 21, 1964, Schwerner, Chaney and Goodman disappeared in Neshoba County. The FBI found their bodies buried in an earthen dam on Aug. 4, 1964, in what became known as the "Mississippi Burning" case.
Killen is serving his sentence at the state prison at Parchman.