Authorities say they have captured one of the two convicted killers who escaped last month from an Arizona prison. The U.S. Marshals office says Tracy Province was arrested with a handgun early Monday in northwest Wyoming, about 60 miles outside of Yellowstone National park. Another inmate, John McCluskey, who was convicted of attempted murder, and suspected accomplice Casslyn Welch, are still on the lam. The U.S. Marshals Service said Sunday information developed within the past two days indicated Province, McCluskey and Welch may be hiding in portions of Yellowstone in either Montana or Wyoming. A third inmate who escaped, Daniel Renwick, also a convicted killer, was arrested in Colorado last week after a shootout with police.