Ye Fan believes that the murderer of Liu Anping must have left clues behind, they just haven't been found yet.
Regarding the murderer's whereabouts, it's definitely in the surveillance; since the surveillance is intact and hasn't been tampered with, there must still be significant value within the footage.
The murderer cannot kill out of thin air and can only use sophisticated methods.
"The alcohol and sleeping pills in Liu Anping's system were enough to make Liu Anping completely unaware of external matters, with no sensory perception even upon death. So, here's the question: how could Liu Anping write an impassioned and expressive suicide note under such circumstances? It's impossible; there must be another motive?"
This question lingered in Ye Fan's mind, but there was still no clear thread to explain it.
"The murderer doing this is undoubtedly a superfluous act, are they misleading us or hiding something?" Ye Fan considered deeply and raised the question.
