Chen Shi said, “You don't need to go yet. Just wait until you have clear evidence.”

“That's right. A complete fingerprint was extracted from this fake key. If you have a suspect, you can compare it with this.”

The next job was to watch the surveillance video of that night. Everyone who came in and out of the community around 12:00 had to be carefully identified. This work was time-consuming and laborious. By 5:30 in the evening, Chen Shi said, “I should go. I need to pick Yueyue up.”

Lin Dongxue rubbed her slightly swollen temples. “We have to work overtime. We’ll tell you the result at the case discussion tomorrow morning.”

“Remember to rest.”

They busied themselves until 8:00 and everyone who left the community after the incident was identified in the video. They created simple photos and...