A massive search is underway, after authorities located a car belonging to a missing Hoover man. 71-year old Frank Stevenson disappeared last week after leaving his Bluff Park home. Investigators say he has dementia, and may have become disoriented. Stevenson's car was discovered on a logging road in Marion. Hoover police say they are searching the area, along with officers from other agencies. Investigators say the terrain is rough, and encompasses thousands of acres. There are no signs of foul play, but it has not been ruled out, police said. Hoover police asked the public to keep searchers and the man's family and friends in their thoughts and prayers.