The Sixteen Suspects

It was nine at night. The police detectives that had been busy for the past few days were still discussing the case around the whiteboard.

"According to the surveillance video, the car drove into the old city one night before the robbery," Peng Xin was explaining the latest piece of information she got. "We couldn't trace the exact direction of where it came from, but we are certain that it was from the south.

"The car stopped in the alley for a night. We talked to the residents nearby. They said that they saw the car when they were going to the bathroom, but they didn't pay much attention to it as it was nothing special."

"That's weird! Did they sleep in the car? Or did they go home to sleep, then returned before the robbery?" someone asked.