What Zhao Yu had said about Captain Dou wasn't a lie. Although Zhao Yu did have a bad temper, Captain Dou's case was indeed the reason behind his violent outburst in the restaurant.
Although Zhao Yu had become a great detective and was praised by many people, he was not exactly a professional criminal policeman. Hence, he was often affected by his cases.
Although Zhao Yu seemed arrogant and unprincipled on the surface, in fact, he was just an ordinary person, filled with the same emotions and desires. Since he had been involved in case investigations, Zhao Yu had been exposed to the darkest sides of human nature. This, coupled with being faced with solving brutal murders, had really impacted him psychologically.
