Understanding Falsus in Uno, Falsus in Omnibus: A Legal Insight

Definition & Meaning

The phrase "false in one thing, false in everything" refers to a legal principle that suggests if a witness lies about one aspect of their testimony, their entire credibility is questioned. This concept originates from Roman law and is often invoked in court to challenge the reliability of a witness's statements. Attorneys use this principle to discredit witnesses whose statements lack corroboration, which means there is no supporting evidence to back up their claims.

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Real-world examples

Here are a couple of examples of abatement:

(Hypothetical example) In a criminal trial, a witness testifies that they saw the defendant at the scene of the crime. However, during cross-examination, it is revealed that the witness previously lied about their whereabouts on another occasion. The defense attorney can argue that due to the witness's dishonesty, their entire testimony should be considered unreliable.

(Hypothetical example) In a civil case regarding a contract dispute, a witness claims to have witnessed the signing of the contract. If it is shown that this witness has a history of providing false statements in other cases, the judge may disregard their testimony based on the principle of falsus in uno, falsus in omnibus.

State-by-state differences

Examples of state differences (not exhaustive):

State Application of Principle
California Widely accepted in both civil and criminal cases.
New York Used primarily in criminal cases during witness impeachment.
Texas Similar application, but with specific rules regarding corroboration.

This is not a complete list. State laws vary, and users should consult local rules for specific guidance.

Comparison with related terms

Term Definition Difference
Impeachment The process of challenging a witness's credibility. Falsus in uno is a specific reason for impeachment.
Corroboration Evidence that supports or confirms a statement. Corroboration is necessary to uphold a witness's credibility.

What to do if this term applies to you

If you find yourself in a situation where witness credibility is in question, consider the following steps:

  • Gather any corroborating evidence that supports your claims.
  • Consult with an attorney to understand how to effectively challenge a witness's credibility.
  • Explore US Legal Forms for templates that can assist in preparing your case or legal documents.
  • If the matter is complex, seek professional legal assistance to navigate the process effectively.

Quick facts

Attribute Details
Jurisdiction Applies in all US jurisdictions
Common Use Witness impeachment in trials
Importance Determines the credibility of testimony

Key takeaways

Frequently asked questions

It means that if a witness is found to be lying about one fact, their entire testimony can be deemed unreliable.