Lu Xuan checked Mo Li's report again and was increasingly impressed by her skill.
...
"That might be so, but we have nothing on He Sen. Like all the other suspects, we can only observe him for now." Quan Yu thought about using some drastic methods but after giving it some thought, he decided it would be too rash.
As Mo Li went through the case notes that Quan Yu finally shared with her, she suddenly asked, "What is the relationship between Zhuang Xin's manager and the guard at Zhuang Xin's neighbourhood?"
"We never looked into it. Why?"
"Look at their testimonies. There are too many similarities. In fact, there are phrases which are carbon copies of each other."
"Bring the kid over here now." Quan Yu glanced at Ah Si. How could they have missed something like that? They had pored through the case files many times but they didn't once catch it.