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§155

Impeaching the Credit of a Witness (Hostile Witness)

Plain-English Summary — Not Verbatim Statutory Text

Sets out how a party can challenge ("impeach") the credibility of their own or the opposing side's witness — including through evidence of prior inconsistent statements. This is the mechanism behind what's commonly called a witness "turning hostile" — giving testimony in court that contradicts an earlier statement they gave (e.g. to police).

  • A witness turning hostile doesn't automatically destroy a case, but it's often a serious, practical setback for whichever side was relying on that testimony.

Explains a term you'll often see in news coverage of criminal trials ("the key witness turned hostile") — it refers to this specific evidentiary mechanism, not just a witness being generally uncooperative.