Admissible evidence

Admissible evidence is evidence that can be legally and properly introduced in a civil or criminal trial for consideration by the finder of fact.

The general rule for evidence is that if it is relevant, it is admissible, unless it falls into a category of evidence that is excluded. Relevance here means that the evidence is something that will aid the court in determining the truth of any facts in dispute. Evidence that might be considered relevant, can be excluded if its value in assisting the Court, is outweighed by any prejudice that the evidence will create.

An example of evidence that is potentially relevant but excluded for its prejudicial effect is evidence of past convictions. A court's role is to determine what happened, and who was responsible, evidence of previous convictions could suggest that the defendant is capable of committing a crime, but the effect of the evidence would too often make the judge or jury (jury in particular) assume that the defendant was guilty, irrespective of the facts of the case.

Other evidence that may be relevant might be excluded for its unreliability. The classic case of this is hearsay evidence. What someone said to another about what happened is generally excluded because there is no way of cross-examining the person making the comment, and also the statement made may not reflect the reality of what happened. Although the hearsay evidence is often extremely relevant, it is excluded because it cannot be verified as being true.