LAS VEGAS (AP) — O.J. Simpson’s lawyers said Tuesday they will take his case back to the Nevada Supreme Court, hoping justices will overturn a lower court judge’s decision last week denying the former football stat a new trial in his armed robbery case.

A notice mailed Monday to the state high court gives Simpson’s new legal team until Jan. 13 to file documents supporting their claim that Simpson didn’t receive a fair trial and challenging the recent ruling by Clark County District Judge Linda Marie Bell, Simpson appeals attorney Patricia Palm said.

“We remain convinced there were errors,” Palm said.

Bell’s ruling means Simpson, 66, isn’t eligible for parole until he’s at least 70.

Palm and attorneys Ozzie Fumo and Tom Pitaro failed to convince Bell that Simpson received ineffective representation from lawyer Yale Galanter, who headed Simpson’s 2008 trial team and his initial appeal to the Nevada Supreme Court.

Galanter defended his performance during hearings in May and said after Bell’s ruling on Nov. 26 that he did everything in his power to defend Simpson.

Palm characterized Simpson as being ready for the next step in his appeal.

She also said she was preparing to ask the U.S. District Court in Nevada for Simpson’s release on grounds that his constitutional trial rights were violated by ineffective assistance of counsel. That filing could also come in January.

Simpson is serving nine to 33 years in a Nevada prison for his conviction on armed robbery, kidnapping and other charges.

A jury found him guilty of leading a group of men in a September 2007 confrontation with two sports memorabilia dealers at a Las Vegas hotel. Two of the men testified they brought guns to the meeting.

Simpson claimed he was trying to retrieve items that had been stolen from him after his 1995 acquittal in Los Angeles in the stabbing deaths of his ex-wife and her friend.

He testified in May that he never knew any of the men with him were carrying guns.