The dog found the first bag a heavy-duty plastic garbage bag stuffed in a duffel bag, with the woman's bloodied leg inside in a trashpile in the Melrose neighborhood.
She was tortured with a hot iron rod, bound, doused in gasoline, then set alight on a pile of car tires and trash in the Western Highlands provincial capital of Mount Hagen, national police spokesman Dominic Kakas said.