Shamed sports star O.J. Simpson faces at least four more years in prison after he lost his bid for a retrial on his 2008 Las Vegas kidnapping and robbery conviction.

The former American football hero applied for a new trial in May (13) over allegations his former attorney, Yale Galanter, mishandled the 2008 case, however, Nevada's Clark County District Judge Linda Marie Bell rejected the application on Tuesday (26Nov13).

Following the hearing, Simpson's attorney Osvaldo Fumo told reporters, "We're obviously very disappointed in the judge's decision... We plan to appeal the case."

Simpson, 66, was sentenced to serve up to 33 years in prison in October, 2008 for entering a Las Vegas hotel room with associates and taking sports memorabilia that he stated belonged to him.

He was granted parole on some of the charges earlier this year (13), but he will still have to endure four more years in prison as his sentences are to be served consecutively.

Simpson's lawyer Patricia Palm tells the Associated Press they now plan to take the case to the Nevada Supreme Court, saying, "We're confident that when we get to the right court we'll get relief because he deserves relief, because he didn't get a fair trial."