Yu Jiuqing slowly shook his head, his voice growing a few shades deeper. "We haven't found the killer yet. The perpetrator in this case is exceptionally cunning and intelligent. Each time, he kills from behind with a small knife, striking directly at the victim's heart. There are no superfluous clues at the crime scenes, so finding him will be difficult."
'The perpetrator in this case?'
Shen Qing immediately seized on the key phrase. "You mean the similar cases in other provinces are different from this one in the Capital City?"
'They were all government office personnel who were killed. The biggest difference must lie with the killer.'
"That's right."
