Evidence is information that exists in physical or digital form—such as written agreements and e-mail communications—as well as testimony from witnesses who have personal knowledge of facts relevant to a dispute. Evidence generally must be relevant to be admitted in court and considered by the factfinder (judge or jury) in resolving a lawsuit. And some forms of evidence, such as expert witness testimony, must be shown to be sufficiently reliable (as determined by the judge) to be admitted in evidence.
In Wyoming, as in other jurisdictions, evidence is crucial in legal proceedings and must adhere to specific rules to be admissible in court. Evidence can be in the form of physical objects, digital data, written documents, or witness testimony. For evidence to be considered by a judge or jury, it must be relevant to the case, meaning it should have a direct bearing on the dispute at hand. Wyoming follows the Federal Rules of Evidence, which provide guidelines on the admissibility of evidence. Expert witness testimony, a specialized form of evidence, requires the party presenting it to establish the expert's qualifications and the reliability of their testimony. The judge acts as the gatekeeper in determining whether the expert's methods and principles are sufficiently reliable and relevant to the case before allowing the jury to consider it. This ensures that the evidence presented to the factfinder is not only pertinent but also trustworthy.