As a man convicted of murder tries to prove to the North Carolina's innocence commission that he didn't commit the crime, his attorney says the commission has misled a judge in order to keep its files secret, causing delays in the case.

Attorney Chris Mumma represents Robert Bragg, who's serving a sentence of life without parole for a 1994 slaying. Bragg contends he's innocent. Last September his case came before the North Carolina Innocence Inquiry Commission, a state agency established to investigate and evaluate post-conviction innocence claims. The commission referred it to a three-judge panel, which is scheduled to hold a hearing in July — 10 months after the original commission hearing and two months after the original May hearing date.

The delay came, in part, as Bragg's attorney fought a protective order that the commission said was necessary to shield a confidential investigative file. The commission said evidence in the file was obtained through methods that require it to be kept under a stricter level of judicial protection than other criminal investigative files.

But in a court filing, Mumma says the commission misrepresented the file's contents. In fact, only one protective order was found in the documents, and defense attorneys already had received that file, Mumma said in the court filing last month in Bragg's case.

While Mumma now has the full commission file and can use it in this appeal, the protective order means she can't use it again in the future without seeking a judge's permission.