This is experience.
Lu Chuan found a problem, but was absolutely baffled.
Even though he knew there was an issue and had studied cases of delayed murder, learning about it is different from experiencing it firsthand, which leaves a deeper impression.
For example, Qin Yong, who went through it eighteen years ago, still hasn't forgotten it, and immediately thought of this possibility.
"Captain Qin... what should we do now?"
What to do?
Whether Zhang Chao committed a delayed murder is still just speculation.
However, based on Lu Chuan's analysis of the thirty-some overlapping footprints at the scene, if the analysis is correct, then Zhang Chao is definitely the last person to enter the scene.
Moreover, the footprints Zhang Chao left when he last entered the scene don't match his claim of not entering the room at the time.
"First arrest him, then interrogate!"
