Which criminal justice agency is responsible for the protection of the rights of the accused?

In the United States, the criminal justice agency primarily responsible for the protection of the rights of the accused is the judiciary, particularly through the court system. Courts ensure that defendants receive fair trials, uphold due process, and protect constitutional rights, such as the right to counsel and the right against self-incrimination. Additionally, public defenders and legal aid organizations play a crucial role in advocating for the rights of the accused.