What is the intervention stage of criminal lawyers?

Lawyers' involvement in criminal cases can be divided into three stages, namely, criminal investigation stage, examination and prosecution stage and public prosecution trial stage. In the criminal investigation stage, it is still necessary to apply to the criminal investigation department, which will arrange a meeting within 48 hours. The investigation department may decide whether to send personnel to the scene according to the circumstances of the case, but lawyers involved in criminal cases involving state secrets should be approved by the investigation department at this stage. However, in practice, due to the need of case investigation, the investigation department has always held an opposing attitude towards lawyers meeting criminal suspects. The so-called 48-hour time limit is like a piece of waste paper. Lawyers in the stage of examination and prosecution and the stage of public prosecution and trial can meet with criminal suspects and defendants at any time during working hours without applying to judicial organs in advance. To sum up, a criminal lawyer is a person who specializes in handling criminal cases. For this kind of people, it is to better reduce the criminal law of the parties and protect the legitimate rights and interests of the parties, but lawyers generally protect the interests of the parties in different ways at different stages.