Mothers and criminal children can become lawyers.

The duty of a lawyer is to protect the legitimate rights and interests of your client, whether it is your parents or others.

Therefore, whether you are a lawyer or not, you can defend your parents.

If a law student can't even protect his parents' legal rights, why should he study law?

Therefore, according to the provisions of the Lawyers Law, the Civil Procedure Law, the Criminal Procedure Law and the tradition of China, you can.