Which type of evidence typically requires an expert witness for interpretation?

Demonstrative evidence typically requires an expert witness for interpretation because it is often complex and needs specialized knowledge to be accurately understood by a jury or judge. This type of evidence includes diagrams, models, charts, and presentations that illustrate concepts or events relevant to a case. Since it aims to convey information that may not be easily understandable by individuals without specific training, an expert witness can provide clarity and context, helping to interpret the demonstrative evidence in a way that is accessible and informative to those evaluating the case.

While other types of evidence can certainly involve expert analysis, demonstrative evidence distinctly benefits from the expertise of a professional who can explain the significance of visual representations and ensure that the information is conveyed accurately and effectively. This role is crucial in legal settings, where the presentation of evidence can significantly influence the outcome of a case.