What does impeachment of a witness entail?

Impeachment of a witness primarily involves attacking the witness's credibility or accuracy. This can be achieved through various methods, such as demonstrating prior inconsistent statements, showing bias or motive to lie, questioning their competence, or highlighting any criminal history that might affect their reliability. The goal of impeachment is to persuade the judge or jury to question the trustworthiness of the witness's testimony, thereby undermining the strength of the evidence that the witness provides.

Other options do not accurately reflect the concept of impeachment. Providing additional evidence to support the witness's claims enhances their credibility rather than challenges it. Challenging the admissibility of evidence pertains to legal arguments regarding whether evidence should be considered by the court, rather than targeting the witness itself. Confirming the witness's statements through corroboration serves to strengthen the witness's reliability, which is contrary to the purpose of impeachment.