SULPHUR, Ind. —Authorities have released the names of three of the five people killed in an overnight mobile home fire in southern Indiana. Crawford County Sheriff Tim Wilkerson says 32-year-old John Denton died in Thursday's fire along with his 8-year-old daughter, Kara Denton, and his 35-year-old half brother, Bill Turben. John Denton's girlfriend and her 3-year-old son also died, but police have not released their names. Wilkerson says a wood stove that was serving as the home's sole source of heat is suspected of causing the 12:30 a.m. fire near the small village of Sulphur, about 30 miles west of Louisville, Ky. The State Fire Marshal's office is investigating the fire. A relative says the rural mobile home had a furnace but John Denton wasn't using it to hold down his bills.