Who Is Mentally Ill and Can Solve the Case?

High IQ dual personality forensic doctor Chuan Moxing × Criminal Investigation Brigade Captain He Zheng (double male protagonists) Chuan Moxing is a highly intelligent forensic doctor who teaches at a university. He suffers from obsessive-compulsive disorder, mysophobia and other mental illnesses. The most important thing is that he suffers from dual personality. The second personality is an antisocial criminal personality, but he doesn't know it. He Zhengjiang, the criminal investigation captain of the first team of the Linshi Criminal Investigation Brigade, and Chuan Moxing were once close friends, but they later parted ways due to some reasons. Many years later, the two met again and worked together to break the ice and solve the case. He Zheng originally thought that the relationship between the two could be restored, but he discovered that Chuan Moxing was carrying a murder case. The old friend and today's comrade-in-arms, faced with this situation, how did He Zheng choose? Should he deceive himself and ignore the strange things, or should he stick to his police duties and arrest Chuan Moxing with his own hands?