What are the requisites for a state witness?

The correct answer highlights key legal principles that govern the admissibility of a state witness. For a witness to be considered a state witness, they must provide testimony that is not only supportive of the prosecution's case but also comes from a credible source. This necessitates that the accused must not appear guilty of the crime charged; otherwise, the witness's testimony could be viewed as biased or less reliable. Additionally, corroboration of the testimony enhances its validity, ensuring that the witness's statements are supported by other evidence or sources.

In this context, the criteria ensure that the legal integrity of the proceedings is maintained, as utilizing witnesses who may appear guilty undermines the fairness of the judicial process. A witness's credibility and the strength of their testimonies play crucial roles in legal cases, making these requisites essential for their classification as state witnesses.