( CNN ) -- Attorneys for imprisoned former football great O.J . Simpson on Tuesday appealed his conviction to the Nevada Supreme Court , claiming his trial was `` fundamentally unfair . '' O.J . Simpson is appealing his conviction for charges including kidnapping and armed robbery . A jury in October 2008 convicted Simpson , 61 , on charges including armed robbery and kidnapping . He was sentenced in December to serve a term of up to 33 years in prison , with eligibility for parole after nine years . In the 47-page brief filed Tuesday , Simpson 's attorneys accuse Clark County , Nevada , District Judge Jackie Glass of judicial misconduct , saying her behavior constituted `` cumulative error that was so egregious and prejudicial that the defense could not get a fair trial . '' The judge inflicted herself into the trial proceedings , issued improper jury instructions , improperly admitted hearsay evidence and refused to allow defense attorneys to fully cross-examine witnesses , the filing alleges . In addition , she would not allow defense counsel to ask prospective jurors about their `` known and unknown '' biases , the brief said , and allowed prosecutors to strike the only two African-American potential jurors eligible to be on the jury . `` Because of the unique nature of the case , a full and complete questioning of potential jurors needed to take place , '' the appeal said . `` The District Court gave no deference to the fact that Simpson brought a lot of baggage into the courtroom . '' Simpson 's conviction came on October 3 -- the 13th anniversary of his controversial acquittal in the 1994 killings of his ex-wife , Nicole Brown Simpson , and Ronald Goldman . The former Heisman Trophy winner , record-setting NFL running back and movie actor had enlisted the help of Clarence `` C.J . '' Stewart and four others in an effort to get sports memorabilia items that Simpson claimed had belonged to him from dealers Bruce Fromong and Al Beardsley . The six men confronted the dealers in a room at the Palace Station Hotel Room and Casino in Las Vegas on September 13 , 2007 , brandishing weapons but not firing them . Four of the men testified against Simpson , while Stewart stood trial alongside him . The four received probation in exchange for their testimony ; Stewart received a sentence similar to Simpson 's , but will be eligible for parole in seven and a half years . CNN Radio 's Ninette Sosa contributed to this report .
Attorneys for O.J . Simpson are appealing his 2008 conviction . The defense team has argued that the prosecution failed to prove beyond a reasonable doubt that he killed Nicole Brown Simpson, and they have asked jurors not to convict him on charges of first-degree murder or voluntary manslaughter. The famed football star was sentenced on charges including armed robbery . Simpson 's lawyers are claiming his trial was `` fundamentally unfair ''