Analysis:
All criminal suspects and defendants should not be found guilty before being found guilty according to law, which is the requirement of modern legal system. The duty of a defender in a criminal case is to present materials and opinions on innocence, mitigation or exemption of criminal responsibility to criminal suspects and defendants according to facts and laws, and to safeguard their litigation rights and other legitimate rights and interests.
Legal basis:
Article 37 of the Criminal Procedure Law
The responsibility of the defender The responsibility of the defender is to provide materials and opinions on whether the criminal suspect or defendant is innocent or light, or to reduce or exempt his criminal responsibility according to facts and laws, and to safeguard the litigation rights and other legitimate rights and interests of the criminal suspect or defendant.