Witness impeachment

Evidence
Part of the law series
Types of evidence
Testimony Documentary Real (physical) Digital Exculpatory Inculpatory Demonstrative Eyewitness identification Genetic (DNA) Lies Consciousness of guilt Direct Circumstantial
Relevance
Burden of proof Laying a foundation Materiality Public policy exclusions Spoliation Character Habit Similar fact
Authentication
Chain of custody Judicial notice Best evidence rule Self-authenticating document Ancient document Hague Evidence Convention
Witnesses
Competence Privilege Direct examination Cross-examination Redirect Impeachment Proffer agreement Recorded recollection Expert witness Dead Man's Statute
Hearsay and exceptions
in English law in United States law Confessions Business records Excited utterance Dying declaration Party admission Ancient document Declaration against interest Present sense impression Res gestae Learned treatise Implied assertion
Other common law areas
Contract Tort Property Wills, trusts and estates Criminal law

Witness impeachment, in the law of evidence of the United States, is the process of calling into question the credibility of an individual testifying in a trial. The Federal Rules of Evidence contain the rules governing impeachment in US federal courts.