Strong? Weak?

The protagonists of the novel are ordinary ordinary people, but every time a murder occurs, when the murderer is looking for someone to vent his anger on, and when the weak are killed by him, he always chooses to be by their side? Could it be that the murderer has already taken a liking to them? Do you think they are a truly weak group? Victims from different social backgrounds seem to have no connection, but they are inextricably linked. The police, private detectives, and the victim's family are involved in the investigation. Who is the murderer? What kind of background made the murderer commit such a murder? The victims were brutally murdered by different murderers out of love, hate, or money. When the police solved the case, they found similar head injuries, similar neck injuries and the same clean napkins at the crime scene. Why is this? Is there any secret hidden behind the real murderer? At the same time, the number of missing people in Zhangqiang City has increased significantly compared with the past. What is the truth? They seem to be different murderers, but why are their murder methods so similar? Is 'Crime Scene' too deeply rooted in people's minds? Or do you have something to hide? Can the protagonist help the police investigate the truth? What is the truth? It's all in this book. . .