The Seventh Silence

When Shen Tinglan, deputy captain of the Criminal Investigation Detachment, was investigating a "secret room live broadcast murder case", he was shocked to find that all the murderer's modus operandi, scene layout, and even the provocative codes left behind were exactly the same as the "Rainy Night Butcher Case" that he personally solved and closed seven years ago. The only difference is that the deceased seven years ago was a prostitute, while the deceased this time was the prosecutor responsible for prosecuting the murderer. What's even more chilling is that the murderer left a line in the live broadcast: "Captain Shen, is the murderer back then really the one you caught?"