There is no use interrogating him now. He won't say anything.
Because the main culprit already has his family under control.
He is being threatened.
If this is the case, let's save Old Cai's family first.
If not, he won't dare to tell the truth.
I was tortured in the detention centre.
This proves that there are informants in the police station.
This was indeed negligence on my part
to let you suffer.
Sorry.
These informants are great for us.