74-year-old woman last seen in central Oak Cliff may be a danger to herself, police say Julia Conley Blackburn was last seen in the 1600 block of Whitedove Drive, near U.S. Route 67 and West Ledbetter Drive Julia Conley Blackburn was last seen April 19, 2020 in the 1600 block of Whitedove Drive, near U.S. Route 67 and West Ledbetter Drive.(Dallas Police Department) Dallas police are asking for the public’s help locating a 74-year-old woman last seen Monday afternoon in central Oak Cliff. Julia Conley Blackburn was last seen around 4 p.m. in the 1600 block of Whitedove Drive, near U.S. Route 67 and West Ledbetter Drive. She may be a danger to herself, police said.