A suspicious target

"President pang, don't worry," Zhao Yu said to pang Zhihui in the interrogation room with a dignified look."Without solid evidence, we will never wrong you!" So, I hope you can cooperate with us. If you can help us find the real murderer, we can prove your innocence, right?"

"Detective Zhao, I know that you have solved many big cases, and you are very famous ..." Pang Zhihui was about to cry. He quickly bowed to Zhao Yu and said,"I really didn't kill anyone. Don't worry, as long as I know, I will tell you!"

"Well, that's good ..." Zhao Yu nodded with satisfaction and said,"President pang, I would like to ask again, when the hanging coffins were excavated in 1985, what was the situation? How many people participated in the excavation?"