I heard a story similar... or maybe not so similar.
A lady was pumping gas and went inside to pay. When she was walking back to her car the clerk came after her before she reached her car and told her she didn't pay. They got into an argument and eventually he took her back inside. When he had her back in the station he explained to her that he saw someone beneath her car and, sure enough, when she looked she saw a man beneath her car. They called the police, but before they arrived the man was gone. When the police arrived they told her that the same had happened to another woman. Her Achilles Tendon was slit so she couldn't run away, her car was stolen, she was rapped, then murdered.
A bit more morbid than you're story, but that's what I heard, though that was here in Virginia.