C27 How to catch the murderer

As the first victim, Ying Ying could directly express the culprit's inner wishes, and could also find the culprit's loopholes. Su Mu let Sang Xin stay in her room, then he brought Zhou Ye to look at the rooms of the other two dead men. He did not find any clues, for in just two short days, the killer was growing at a very fast pace.

Although it was just a guess