Solve the Case: I Have a Murderer's Book

As an ordinary detective, the policeman accidentally obtained a murderer's guide. Every case that he focuses on will have detailed clues recorded in this book, so that the criminals can't hide. Guan Dui: "This case is absolutely seamless and there is no evidence left." Detective Qin: "He must be a veteran, and he has committed crimes more than once." **: "Don't think about it, he is the murderer." After quickly becoming a top-notch detective, ** did not feel happy. Because, he found that he seemed to be falling into a bigger quagmire... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.