Why is immunity granted to a witness relevant in court proceedings?

Immunity granted to a witness is relevant in court proceedings primarily because it provides legal protection against prosecution based on the testimony provided. When a witness is granted immunity, they can testify without the fear that their statements may be used against them in a criminal case. This encourages witnesses to come forward and provide truthful testimony, facilitating the pursuit of justice.

The principle underlying immunity is that it can help uncover the truth in cases where a witness may possess crucial information but might otherwise be reluctant to testify due to fear of self-incrimination. By assuring the witness that their testimony will not expose them to criminal liability, courts can gather vital evidence needed for prosecution or defense.

Other options do not accurately reflect the primary purpose of immunity. Unrestricted questioning without any protections could discourage witnesses from speaking, and longer sentences for defendants are unrelated to the witness's immunity status. Additionally, immunity does not prevent cross-examination; witnesses can still be tested on the credibility of their testimony.