The Associated Press reports that the U.S. Supreme Court has decided not to hear the appeal of a convicted serial killer, who helped a police officer in New Orleans kill another officer and two others during a robbery in 1995.

On Tuesday, the high court’s justices determined they would not review the ruling from the Louisiana Supreme Court that upheld his convictions. Defense attorneys were seeking a review because of questions about impartiality of jurors and the judge at his original trial.

Rogers LaCaze claims the judge should have stepped down from the case and given it to another judge. His signature was found on a form that the convicted police officer used to get a handgun from the police evidence room, and that gun is believed to have been used in the murders. The judge has denied the signature on the form in question is his.

*Photo The Associated Press