CENTERVILLE — Authorities have arrested a 27-year-old man suspected of killing a hunter in south-central Iowa. The Iowa Public Safety Department said Wednesday that Ethan Davis, of Promise City, is charged with first-degree murder. The department says Davis killed 31-year-old Curtis Ross, of Cedar Falls, whose body was found in a remote area of Appanoose County on Saturday. He’d been reported missing earlier in the day. An autopsy report says Ross suffered several stabbing and gunshot wounds.