RAY: This is from my Law Enforcement series. It was sent in by David Crop.

An off-duty policeman was vacationing this summer with his family when he pulled off the highway to get gas. While the attendant was filling the tank and someone else was cleaning the windshield, the wife was watching her husband. There he sat almost in a daze, his eyes glued to the rear of the car that was being refueled directly in front of theirs.

'What's the matter, Hon?' she asked.

'I don't know for sure,' he said, 'but there's something fishy about that car in front of us.'

'Looks perfectly normal to me,' she said.

'Well not to me!' he shot back. 'I think it's a stolen car. In fact, I'm going to call my partner back at the station house, and I'm going to have him run that plate number, and I bet it won't match the year, make and model of the car that it's attached to.'

The question very simply is: What did he notice that made him suspicious?