HOUSTON (AP) — The U.S. Supreme Court has refused an appeal from a Texas death row inmate whose attorneys were demanding state officials disclose the source of drugs intended to execute him.

Robert James Campbell had a pair of appeals in federal courts last month as his scheduled execution neared. While the Supreme Court appeal on drug secrecy was pending, a lower federal appeals court stopped the 41-year-old inmate’s punishment to allow his lawyers to pursue appeals that he’s mentally impaired and ineligible for the death penalty.