The story of the night Chapter 7

It's about Jay Chou and Yu Hao investigating the murder of a professor. The mv was filmed in Britain. At first, I thought it was the waiter who shot the bullet, but I didn't expect it to end up. The warhead is the only witness to the crime. The murderer turned out to be Yu Hao! He also killed the witness who played the warhead. Later, he died, too, and Jay Chou learned later, but he chose to keep the ending of this case secret.