Among the key actors in the criminal justice process are Public Prosecutors and Assistant Prosecution Officers ( APOs ). While both play a crucial role in criminal trials, their functions, authority, recruitment process, and scope of responsibilities differ significantly. APO Full Form : Who is an APO ? An Assistant Prosecution Officer ( APO ) is a state government lawyer in places such as Bihar, Uttar Pradesh, and Jharkhand. They represent the state in criminal court. When someone is accused of a crime, the APO acts as the government's legal representative. The role of an Assistant Prosecution Officer ( APO ) is crucial in the judicial system of India, as they serve as legal representatives of the state in criminal cases. APO stands for Assistant Prosecution Officer. Assisting prosecution officials in a variety of court matters is the typical work description of an assistant prosecutor. It may entail a variety of duties, such as obtaining pertinent data and supporting documentation for court proceedings.