Evidence (law)
Rules governing proof of facts in legal proceedings.
The law of evidence, also known as the rules of evidence, encompasses the rules and legal principles that govern the proof of facts in a legal proceeding. These rules determine what evidence must or must not be considered by the trier of fact—a judge in bench trials, or the jury in jury cases—in reaching its decision. The law of evidence is also concerned with the quantum (amount), quality, and type of proof needed to prevail in litigation, and the rules vary depending on whether the venue is a criminal court, civil court, or family court, and by jurisdiction.
- field
- Law
- known_for
- Rules governing admissibility, relevance, and standards of proof in legal proceedings
- key_concepts
- Hearsay, authentication, relevance, privilege, witnesses, opinions, expert testimony, identification, physical evidence
- standards_of_evidence
- Reasonable suspicion, preponderance of the evidence, clear and convincing evidence, beyond a reasonable doubt
- historical_roots
- Hammurabi's Code, Old Testament, Ancient Roman law, Medieval Roman law, English common law
Lore & Background
The law of evidence has ancient roots. Hammurabi's Code contained provisions requiring an oath and witness, and the Old Testament demanded at least two witnesses for conviction of a crime. Ancient Roman law allowed judges freedom to evaluate evidence but insisted that 'proof is incumbent on the party who affirms a fact, not on him who denies it' and that 'no-one should be convicted on suspicion.' Medieval Roman law developed an elaborate grading of degrees of evidence, building on the Biblical two-witness rule to conclude that a single witness or private documents could constitute half-proof, which might justify torture to extract further evidence. Because evidence in the continental (civil law) system was evaluated by judges rather than juries, that system did not develop exclusionary rules of evidence in the way English law did.
Reader's Guide
A distinct feature of English common law historically was the role of the jury as a finder of fact, as opposed to the judge as finder of law. The creation of modern jury trials in the 16th and 17th centuries necessitated rules of evidence to regulate what testimony and other evidence could be put before the jury. The prohibition on hearsay became an early rule, justified by the concern that juries could not be trusted to disregard hearsay evidence. In the United States, the system of evidentiary rules is very complicated, partly due to the right to a jury in practically all criminal cases and many civil cases, and the consensus that tight limitations on admissibility are necessary to prevent a jury of untrained laypersons from being swayed by irrelevant distractions. The law of evidence also addresses relevance and social policy: evidence must be relevant, but relevant evidence may be excluded if it is unfairly prejudicial, confusing, or misleading. Standards of evidence range from reasonable suspicion to beyond a reasonable doubt.
Did You Know?
- Hammurabi's Code had some evidence requiring an oath and witness, specifically in laws 10, 11, and 12.
- The Old Testament demanded at least two witnesses for conviction of a crime.
- Medieval Roman law concluded that a single witness could constitute half-proof, which might justify torture to extract further evidence.
Frequently Asked Questions
Who is Evidence (law)?
Evidence (law) is the body of rules and legal principles that dictate what proof a judge or jury may weigh when deciding a case. It sets the boundaries for what can and cannot be presented in criminal, civil, or family court proceedings.
What are Evidence (law)'s powers/role?
Its core function is to govern the admissibility, relevance, and quality of proof in legal proceedings. It controls how much, what kind, and what type of evidence is needed to prevail, and it manages concepts like hearsay, authentication, privilege, and expert testimony.
How does Evidence (law)'s story end?
The outcome depends on the applicable standard: criminal cases demand proof beyond a reasonable doubt, civil matters usually require a preponderance of the evidence, and some disputes call for clear and convincing evidence. The trier of fact applies whichever standard fits the venue to reach a final verdict.
Why is Evidence (law) important?
Without structured rules, courts would be overwhelmed by unreliable, irrelevant, or prejudicial material, making fair adjudication nearly impossible. Its lineage stretches from Hammurabi's Code and Ancient Roman law through English common law, underscoring how central orderly proof has been to justice across millennia.
What are Evidence (law)'s key allies?
Its main supporting concepts include hearsay rules, authentication, relevance, privilege, witness testimony, expert opinions, identification procedures, and physical-evidence standards. Together they form the toolkit that shapes how facts are established in any courtroom.
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