Human remains found in a ravine are believed to be those of a woman who went missing last month. Douglas County Deputies say 51-year-old Randi MacLean disappeared on August 23 and was reported missing by her husband three days later. Authorities had responded Sunday to a report of an abandoned white pickup truck, which was later identified as belonging to MacLean. Search and rescue crews combed through the area for five hours and located the remains of a woman in a steep ravine. An autopsy is scheduled to determine the cause of death.