There was a startling development Thursday in the high-profile cold case murder of a Washington Post copy editor. Sources tell News4 that investigators have identified a person of interest in the death of Alison Thresher. The 45-year-old disappeared from her Bethesda apartment in the 4500 block of Sangamore Lane in May 2000. A day later, her car was found about a mile away near the C & O Canal trail where Thresher liked to take walks. For almost 12 years, Thresher’s disappearance has been a mystery. Recently, during a court hearing in an unrelated case, prosecutors referenced Fernando Asturizaga as a person of interest in Thresher's murder. Law enforcement sources confirmed that status to News4. Alison Thresher’s body has never been found.