impeach a witness

Definition

Challenging a witness's credibility through cross-examination, prior inconsistent statements, or evidence of bias. Not to be confused with impeaching a president, though both involve questioning someone's trustworthiness.

Example Usage

The defense attorney impeached the witness by showing his prior conviction for fraud.

Origin

From Old French 'empeechier' meaning 'to hinder' or 'to accuse'

Fun Fact

Impeaching a witness is a favorite lawyer TV drama moment, but in real trials it often just means reading boring contradictions from depositions.

Source: Trial practice and evidence terminology

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