What is the primary purpose of filing an Accusatory Instrument?

The primary purpose of filing an Accusatory Instrument is to initiate legal proceedings. This legal document sets forth the accusations against an individual and serves as the formal mechanism to start the prosecution process. It typically includes details regarding violations of laws or ordinances, providing enough information to inform the accused of the charges they face. By initiating this step, it enables the judicial system to address the alleged offenses, ensuring that legal protocols are followed.

The other options do not align with the legal function of an Accusatory Instrument. Documenting performance reviews and tracking officer training pertain to internal administrative processes within an organization, while maintaining public relations focuses on the external image and communication strategies rather than the initiation of legal actions. The emphasis on legal proceedings underlines the critical role the Accusatory Instrument plays in the criminal justice system.