PAULS VALLEY, Okla. (AP) — A suspect has been arrested in Oklahoma in the deadly shooting of a southwest Missouri couple who were killed when they interrupted a robbery at their home.

The Dallas County Sheriff’s Office says Billy Sage Medley was arrested early Tuesday in Pauls Valley, Oklahoma. He is charged with two counts of second-degree murder in the deaths of Joe and Brandy Allen. The sheriff’s office says the Allens were killed last month at their home in the town of Tunas during an apparent gunfight. Their pickup truck was taken.

Another suspect, Jeffrey Dale Lee Stevenson, was arrested last week and also is charged with the couple’s deaths. Two others are charged with abandonment of corpse for allegedly visiting the homicide scene without telling authorities they had seen the bodies.