St. Louis ? A federal appeals court Thursday rejected American Indian activist Leonard Peltier’s request for reductions in the two consecutive life sentences he got in the 1975 killings of two FBI agents, saying the appeal came far too late.

An attorney for Peltier has argued that ballistics evidence not considered by his client’s sentencing judge could have led to two concurrent life sentences, not the back-to-back ones Peltier has been serving since his 1977 conviction and sentencing.

Under concurrent terms, his attorney has argued, Peltier would have been eligible for parole a decade ago. Now federally imprisoned in Leavenworth, Kan., Peltier is scheduled for his next full parole hearing in 2008.

Earlier appeals, including a sentence-reduction request, have been denied.

On Thursday, a three-judge 8th U.S. Circuit Court of Appeals panel unanimously ruled that Peltier’s time for arguing the “new” ballistics evidence he has known of since 1985 long has passed.

“And equity does not support extending the 120-day filing period for the 17 years it has taken Mr. Peltier to file his renewed … motion,” 8th Circuit Judge Morris Sheppard Arnold wrote.

The 8th Circuit also said Peltier’s sentences were not illegal.

Peltier’s attorney, Eric Seitz of Honolulu, called Thursday’s ruling “a disgrace” and proof that “nobody who seems to care about Leonard is in a position of responsibility or authority.”

Seitz said it was unclear whether he would ask the 8th Circuit to reconsider or if he would take the matter to the U.S. Supreme Court.

“I’m not particularly optimistic that any of the judges now sitting have any compassion or willingness to do the right thing here,” he said. “They’re more inclined to let him rot in prison.”

Peltier, a member of the American Indian Movement, was convicted in the June 1975 slayings of FBI agents Ron Williams and Jack Coler on South Dakota’s Pine Ridge Indian Reservation. Both agents, who the FBI said were searching for robbery suspects, were shot in the head at point-blank range after they were injured. Their bodies were left on a dirt road.

Peltier, 57, was charged with taking part in the slayings, but whether he fired the fatal shots was never proved.