The 22-year-old man suspected of killing two women in DeKalb County died Friday night at Vanderbilt Hospital, according to WJLE radio in Smithville.Brandon Michael Gray died Friday from a self-inflicted gunshot wound to the head after he is believed to have killed his ex-girlfriend and her stepmother on Thursday.Heather Nichole Eley, 21, and her stepmother Lori Ann Eley, 42, were found in their home on Allen’s Chapel Road in DeKalb County. Officers say they were stabbed and shot.Gray is the ex-boyfriend of Heather Eley. They reportedly have two children together, a boy and a girl both under age 3.