In this case, there should be evidence that he broke the law. Like you said, you can call the police. Form comes first. Give him a characterization. Then according to the qualitative results. Require the procuratorial organ to file a criminal lawsuit with civil compensation with the people's court.
Professional support
This kind of matter is usually handled by company lawyers. Generally involving criminal cases, when public prosecution is initiated. The company may appeal to the people's court. Bring incidental civil compensation.