The correct answer is option 'B' - The public.

Explanation:

The criminal justice system is a complex network of individuals and institutions that work together to enforce laws, investigate crimes, prosecute offenders, and administer justice. It involves various stakeholders who play different roles in ensuring the fair and effective functioning of the system. The four options mentioned are key actors in the criminal justice system, but the public does not directly play a role in the system's operation.

1. The police:
- The police are law enforcement officers responsible for maintaining public order, preventing and detecting crimes, and apprehending offenders.
- They are the first point of contact in the criminal justice system and play a crucial role in collecting evidence, conducting investigations, and making arrests.
- Their primary duty is to protect and serve the community by upholding the law.

2. The defence lawyer:
- The defence lawyer represents the accused individuals in court and ensures that their rights are protected.
- They provide legal advice, build a defence strategy, and advocate for their clients during trial proceedings.
- Defence lawyers play a crucial role in safeguarding the accused's right to a fair trial and ensuring that the prosecution meets the burden of proof.

3. The judge:
- The judge presides over the courtroom and makes sure that the trial is conducted fairly and impartially.
- They interpret and apply the law, make decisions on legal issues, and determine the guilt or innocence of the accused.
- Judges play a vital role in safeguarding the rights of all parties involved and ensuring that justice is served.

However, the public does not have a direct role in the criminal justice system. While they are impacted by the system's decisions and outcomes, their role is more passive in nature. The public's role primarily revolves around reporting crimes, serving as witnesses, and participating in the jury selection process. They also have the responsibility to be informed citizens, support law enforcement efforts, and contribute to maintaining a just and safe society. Nonetheless, they do not have an active role in the day-to-day operations of the criminal justice system.

Who among the following does not play a role in the criminal justice system?
The correct answer is B: The public.
Explanation:
The criminal justice system involves various individuals and entities who play different roles in the administration of justice. Here is a breakdown of the roles played by each of the options listed:
A: The police
- The police are responsible for maintaining law and order, preventing crime, and investigating criminal activities. They play a crucial role in apprehending suspects and gathering evidence.
B: The public
- While the public has an important role to play in reporting crimes and acting as witnesses, they do not have an official role within the criminal justice system.
C: The defence lawyer
- The defence lawyer represents the accused and ensures their rights are protected throughout the legal process. They advocate for their clients' interests and present a defense against the charges.
D: The judge
- The judge is responsible for overseeing legal proceedings, ensuring fairness, and making decisions based on the law and evidence presented. They determine guilt or innocence, impose sentences, and ensure due process is followed.
In summary, all options except B (The public) play a role in the criminal justice system. The public's role is mainly to report crimes, act as witnesses, and participate in jury duty if called upon.