He had been scared before, and scared twice at that. Subconsciously, he had already revealed key information.
It was like a murder case.
You might have identified several possible suspects, but without evidence, you can't prove who the real killer is.
Then, one of them has a slip of the tongue and says they've killed someone before.
At that point, there's no need to keep pressuring him, using scare tactics to try and frighten him into revealing *how* he killed them and *where*.
That's not easy.
Instead, you should go back to the case itself.
He said he killed someone, so you should look for evidence on the victim—ironclad evidence proving he was the killer.
Once you have that key evidence, why bother scaring him? Just show up at his door and bring him in for questioning.
Applying that analogy to the current situation...
Zou Cong had unconsciously revealed key information twice.
So it was highly probable that Director Chen had ordered it, forcing Yuan Jie to his death.
