Death row inmate Robert Roberson has filed a new appeal with the Texas Court of Criminal Appeals, the state's highest criminal court, presenting what his defense claims are new legal and scientific developments aimed at overturning his death sentence.

The filing includes opinions from legal and scientific experts arguing that Nikki died of pneumonia and changed science warrants a new trial.

During his 20 years behind bars, Richard Lee Tabler says he's found God and leads a ministry of Death Row inmates. He's written two books about his life.

The appeal includes new testimony from experts who say Roberson’s daughter died of natural causes, and cites the court’s exoneration of a man in another shaken baby syndrome case out of Dallas County.

Robert Roberson, a Texas death row inmate, has filed a new appeal. Roberson, who has autism spectrum disorder, claims innocence after 22 years on death row.

If not exonerated, the application for relief announced Wednesday also asks the Court of Criminal Appeals to grant Roberson a new trial, or send his case

The appeal includes new testimony from experts who say Roberson’s daughter died of natural causes, and cites the court’s exoneration of a man in another shaken baby syndrome case out of Dallas County.