O.J. Simpson and his attorney, Patricia Palm, appeared in court last May. (Reuters)

O.J. Simpson will remain behind bars after his request for a new trial on his 2008 conviction for robbery and kidnapping of two sports memorabilia dealers in Las Vegas was denied.

Clark County (Nev.) District Judge Linda Marie Bell ruled against Simpson, who had been sentenced to up to 33 years in prison for his role in a sting to recover what he said was stolen mementos of his stellar football career. Simpson, 66, will be eligible for parole in four years.

“We’re obviously very disappointed in the judge’s decision,” Osvaldo Fumo, one of Simpson’s attorneys, said (via the Los Angeles Times). “We plan to appeal the case.”

Simpson appeared in court in May and his leaden, aged appearance was shocking. He alleged that he did not know that the men accompanying him to try to retrieve property from sports memorabilia dealers were armed with guns.

“Given the overwhelming amount of evidence,” Bell wrote in her decision (via CNN), “neither the errors in this case, nor the errors collectively, cause this court to question the validity of Mr. Simpson’s conviction.”

Simpson, of course, was acquitted in 1995 of the murder of his ex-wife, Nicole Brown Simpson, and Ron Goldman. He was later found to be liable in a civil lawsuit.