A System That Comes Face to Face with a Murderer

Kou Hanzhi took a psychological test when he entered school, and the results showed that he may have mild schizoid personality disorder. Kou Hanzhi was very disdainful of this and said, "I'm not sick." As a result, I met the legendary math department Yin Huaiyu in the counselor's interview office, and heard that this person was also interviewed for a psychological test. Yin Huaiyu: "Why were you called here?" Kou Hanzhi: "You must be sick." Yin Huaiyu: "I am sick." Kou Hanzhi: "..." So God gave them a generous gift and threw them both into a system where they could face murderers. System: "There are the most abundant psychopaths here. Please determine the suspect's motives, modus operandi, and identity. I wish you all good luck." Kou Hanzhi: "As for this sick person, can you understand them and compare your feelings with others?"