Ghost Story: A He Said, She Said Cozy Mystery. He said, She said Detective Series, #4

While driving on an isolated stretch of road late at night, Tanja passes a horrifying accident. She hurries back to the scene only to find that the vehicle involved and the pedestrian have both vanished. After a thorough investigation, even the police can find no evidence of a hit and run. However, Sheriff Diekmann seems to recall a similar incident in one of his old cases.Things get even creepier when Tanja realizes that the man she saw run down that night is the same man who went missing years ago.
His body was never found. Suddenly, the Shepherds aren't sure whether they're investigating a hit and run or chasing down a ghost.