Twelve Orders: Intervene the Mysterious Case and Trace the Dead Soul

Xu Tian traveled through time to a world where he could practice martial arts. As soon as he traveled back in time, he broke into a murder scene. Bad news, I'm a suspect. Good news, a mysterious token appeared inexplicably in the hand, and the token issued a reward mission: catch the prisoner! Could it be that this is my chance? ! However, none of the people at the scene of the murder at the beginning could be handled by Xu Tian, ​​who had just traveled through time. Should I catch the criminal? Real or fake? The criminals here are all skilled in martial arts. Although Xu Tian is a little clever, he can solve the case and find the real murderer. But if you don't know how to use force, you can't catch the criminal on your own! How can a detective who can solve cases rely on his wisdom to explore the world from scratch, and use mysterious tokens to accumulate martial arts skills bit by bit in this world where martial arts practitioners are everywhere? (Light reasoning + upgrade. The first case is only solved, but the criminal cannot be caught)