Can I get a lawyer to reduce my sentence after committing a crime?

Asking a lawyer after committing a crime may not necessarily reduce the sentence. Whether to reduce the sentence depends on the court, not the lawyer. However, hiring a lawyer has the following functions: first, the role of a lawyer in the investigation stage: when meeting a criminal suspect, a lawyer can explain the suspected charges and relevant legal knowledge to the criminal suspect. Second, the role of lawyers in the stage of examination and prosecution: 1. Meet with the criminal suspect, and provide the criminal suspect with such assistance as bail pending trial during the investigation stage. 2. A lawyer can learn more about the relevant case from the examination organ of the procuratorate, including reading or copying the identification technical data and prosecution opinions involved. 3. Lawyers can put forward defense opinions to the procuratorial organs on the innocence of the criminal suspect, the light crime, and this crime and that crime. Article 78 of China's Criminal Law stipulates that a criminal sentenced to public surveillance, criminal detention, fixed-term imprisonment or life imprisonment may have his sentence reduced if he can conscientiously abide by prison regulations and receive education and reform during the execution period, and if he truly repents or makes meritorious deeds; Those who have made significant meritorious service shall have their sentences reduced. Commutation refers to a criminal judicial activity in which criminals who are sentenced to public surveillance, criminal detention, fixed-term imprisonment or life imprisonment according to law are put forward by the organ responsible for executing the punishment when there are legal circumstances for commutation, and the people's court commutes their sentences according to law.