章節 1832: Chapter 1831-more advanced methods

The next afternoon, in the same temporary office of the Special Investigation Group.

Zhao Yu didn't go directly to the prison, but secretly investigated the situation in the prison.

He asked Zeng ke to screen all the staff who were holding Nong zhifa prison, in an attempt to find any potential suspects.

Zhao Yu's screening criteria was that the suspect's age had to be at least before 1975. As the first case in the memoir happened in 1993, the suspect must be quite old.

Secondly, this person had to have sufficient time to get in touch with Nong zhifa. If someone had really given Nong zhifa a psychological suggestion, then the two parties must have been in contact for a long time.

Finally, the most important point was that the suspect's life trajectory had to at least match or be close to all the crimes in the memoir.

In the end, after filtering through the three criteria above, the final result was a " 0"!

Not even one!