OKLAHOMA CITY (AP) — The wife of a former Oklahoma prison warden found guilty of helping a convicted killer escape will continue to appeal her conviction in spite of the U.S. Supreme Court’s refusal to review it, her defense attorney said Wednesday.

Bobbi Parker, 50, was convicted in September 2011 by a jury in Greer County of helping Randolph Franklin Dial escape from the Oklahoma State Reformatory more than 18 years ago. Parker, who was found living with Dial in Texas in 2005, served a little more than half of her year-long prison sentence before her release in April.

But she maintains her innocence. Her attorney said he plans to appeal in U.S. District Court, arguing that appeals in state court were unsuccessful because Parker cannot afford the $100,000 cost of a transcript of her four-month-long trial.

“She did not get a fair trial. Numerous constitutional errors occurred,” defense attorney Garvin Isaacs said.

The Oklahoma Court of Criminal Appeals rejected Parker’s request for more time to purchase the trial transcript and to declare her indigent, which would require the state to provide it. Isaacs then asked the U.S. Supreme Court to review Parker’s conviction, but the court refused last week.

Greer County District Attorney John Wampler said he hopes the Supreme Court’s action marks the end of the case, “but we’ll just have to wait and see whether anything else is filed.”

Parker lived with her husband, former deputy warden Randy Parker, on the grounds of the prison in Granite at the time of Dial’s escape. Prosecutors alleged Bobbi Parker fell in love with Dial while they worked together in a pottery program that was based in the couple’s garage. She and Dial disappeared on Aug. 30, 1994.

Defense attorneys alleged that Dial, who was serving a life sentence for the 1981 murder of Broken Arrow karate instructor, drugged and kidnapped Parker, and held her hostage. Parker and Dial were found living together on a chicken farm in Texas in April 2005.

Dial pleaded guilty to escape before his death in 2007, maintaining that he’d kidnapped Parker at knifepoint. But prosecutors claimed that the two agreed that if either were captured they would say she was held against her will.

Parker was reunited with her husband after authorities found her living with Dial and they are still together, according to Isaacs.