Needs to be determined based on the circumstances of the crime. If the person involved in the case has been criminally detained, close relatives should consult a lawyer in person as soon as possible, and the lawyer will meet with the person involved through the entrustment procedure. After understanding the case, go to the investigative agency and procuratorial agency to review the file, grasp the evidence held by the investigative agency, and understand the prosecution opinions of the procuratorial agency. The punishment for criminal suspects needs to be estimated based on the conclusions after meeting, reviewing papers, and communicating with case investigators. After a comprehensive understanding of the case, determine the direction of defense and choose not guilty or misdemeanor defense, so that the criminal suspect can escape punishment or obtain a lighter or reduced punishment.