A death row inmate is suing the U.S. Justice Department with the hope of acquiring documents that he claims will help prove his innocence in a shooting that left a police officer and two others dead in 1995 in New Orleans.

Lawyers for the inmate, Rogers Lacaze, contend in the lawsuit the federal government has background information about the actual accomplice in the shooting. The Justice Department, according to the suit in Washington federal district court, will neither confirm nor deny the existence of any FBI records.