Unless it was a spur-of-the-moment decision, someone should have shown up near the kindergarten in advance.
Xu Huo asked the teacher for surveillance footage from the days leading up to the incident, covering the premises and the two entrance doors.
"But the video retention period is short," Teacher Zhao said. "These are stored in the cloud and get automatically overwritten after a while."
If the outsider players were from other districts, they wouldn't need to be near the kindergarten to know the situation inside.
Both of them thought the chances of finding any clues were slim, but Xu Huo patiently watched all the footage from those days, picked out one video segment, paused it, and pointed at a figure passing by on the street next to the kindergarten, asking, "Have you seen this person before?"
