He entered the restaurant, where the manager promptly escorted him to the security room, knowing he was there to review the footage.

"Mr. Monroe, this is the footage around 8:50 p.m.," the manager told him.

In the video, Zara and about a dozen of her classmates walked out of the restaurant. Their faces were slightly flushed, with hazy gazes. Before long, a black Maybach pulled up outside. A man that looked like an assistant got out and helped Zara into the car. After closing the door, he returned to the car, and they quickly drove away.

The cameras at the restaurant hadn't picked up the car's license plate.

Seeing the...