Ask a lawyer first, and then you can see the suspect in time, which can reduce the psychological pressure of the suspect, at least calm him down. Let the suspect see hope. I think this is the first and most important role of hiring a defense lawyer. Second, lawyers can apply for bail pending trial if they find that the criminal suspect's crime is minor.
Legal basis: Article 38 of the Criminal Procedure Law of People's Republic of China (PRC), the rights of defense lawyers during investigation, and defense lawyers can provide legal assistance to criminal suspects during investigation; Acting as an agent for complaints and accusations; Apply for changing compulsory measures; Ask the investigation organ about the crimes and cases suspected by the criminal suspect, and put forward opinions.