The Suspect
Feng Xinying went to the security division again. There she resumed watching all the recordings. While she was watching them, she came up with an idea. "Don't show me all of them. Show me the recordings of the lunchtime and those after the office time was over because I was there most of the time on the desk, so obviously the perpetrator couldn't have come during the time when I was there."
The security head manager dug out only those recordings. She started watching them one by one patiently. No result came out from the ones that were recorded during lunchtime. Feng Xinying was getting exhausted. No matter in what direction she could think of, she was not able to pinpoint the person who would do this kind of an act. It was very clear that the person knew where the physical file was otherwise he or she couldn't have stolen it away.