NEWYou can now listen to Fox News articles! A woman whose remains were found in a shallow grave in Riverside County, California, more than four decades ago has been identified as a multimillionaire real estate investor who vanished in 1981.The Riverside County Sheriff’s Coroner’s Bureau said advances in investigative genetic genealogy, along with dental records, confirmed the victim was Thelma Gaston, 80, whose disappearance sparked a high-profile Los Angeles murder investigation.The case began on Nov. 28, 1981, when people searching for firewood near Sugar Loaf Mountain discovered skeletal remains protruding from a shallow grave.Riverside County sheriff’s investigators recovered the remains…