By Hannah Metzger From The Gazette COLORADO SPRINGS, Colo.—Investigators have found small bone fragments at the property of Edna Nadine Turnbull, a 91-year-old woman who has been missing since the Marshall fire destroyed her Superior neighborhood nearly three weeks ago. The Boulder County Sheriff’s Office announced the discovery Wednesday. Investigators are now testing the bone fragments to determine whether they are human or nonhuman. It may be weeks or months before results are available, deputies said. “We remain committed to seeking answers and closure for the Turnbull family,” the sheriff’s office said in a statement. Turnbull was last seen Dec. 30, going into her home in the 1500 block of South 76th Street in Old Town Superior. Authorities ordered residents to evacuate because of the Marshall fire, but Turnbull went back inside to try to rescue her dogs. Turnbull is the last remaining missing person connected to the fire, which …