Imprisoned former football star O.J. Simpson lost his latest appeal of his 2008 kidnapping and armed robbery conviction in Las Vegas.

A three-member Nevada Supreme Court panel rejected Simpson's request for a new trial, ruling in a 16-page order Thursday that there was no reason to overturn a lower court judge's decisions in the case.

"We ... conclude the district court did not err in denying these claims," justices Ron Parraguire, Michael Douglas and Michael Cherry said.

Simpson lawyers filed the appeal last October, arguing that Clark County District Court Judge Linda Marie Bell was wrong to deny Simpson a new trial on charges that got Simpson sentenced to 9 to 33 years in a botched hotel room heist.

Simpson lawyers Patricia Palm, Ozzie Fumo and Tom Pitaro argued that his trial attorney mishandled his case and had conflicts of interests. The three attorneys didn't immediately respond to messages late Thursday, and it wasn't immediately known if Simpson was aware of the ruling.

Simpson, 68, is serving his sentence in a northern Nevada prison after a jury found him guilty of multiple felonies for leading five other men in a September 2007 confrontation with two sports memorabilia dealers at a Las Vegas hotel. Two of the men with Simpson testified they brought guns, at Simpson's request.

The Heisman Trophy winner, NFL Hall of Fame member and former television and movie star didn't testify at his robbery trial in Las Vegas. His attorneys, Yale Galanter and Gabriel Grasso, claimed Simpson was just trying to retrieve items stolen from him after his 1995 acquittal in Los Angeles in the deaths of his ex-wife, Nicole Brown Simpson, and her friend, Ronald Goldman.

The Supreme Court in September 2010 rejected a previous Simpson appeal, filed by Galanter.

Simpson's appeal argued that his multiple convictions and sentences for assault with a deadly weapon and robbery with use of a deadly weapon constitute double-jeopardy; that Galanter should have challenged his multiple convictions and punishments; and that the jury should have been given a chance to consider lesser kidnapping and theft offenses.