Psychiatric Hospital Talent Introduction Plan

I, Gu Zhizhi, have a PhD in criminal psychology and am an undercover mental hospital for my thesis. Next door is an economics professor on the run, opposite is a gangster lawyer, and downstairs is an undercover detective. Me: This year's "talents" are pretty good, and the papers are solid. Then, a real patient died. A cross was left on the wall. After checking and checking, I found that everyone is pretending. After checking and checking, I found out - Lao Zhou is not Lao Zhou, and Lao Wang is not just Lao Wang. Me: I was just here to write a thesis, how did it turn into solving a crime? ——"Mental Hospital Talent Introduction Plan": Come here and solve the case by the way.