Yes, you can. When interrogating a criminal suspect for the first time or taking compulsory measures against him, the investigation organ shall inform him that he has the right to entrust a defender. The people's procuratorate shall, within three days from the date of receiving the case materials transferred for examination and prosecution, inform the criminal suspect that he has the right to entrust a defender. The people's court shall, within three days from the date of accepting the case, inform the defendant of the right to entrust a defender. If a criminal suspect or defendant requests to entrust a defender while in custody, the people's court, the people's procuratorate and the public security organ shall promptly convey it.
legal ground
Article 165 of the Civil Code of People's Republic of China (PRC) * * * If the power of attorney is in written form, the power of attorney shall specify the name of the agent, matters of agency, authority and time limit, and shall be signed or sealed by the client.