An expert witness is a person with specialized knowledge, skills, or experience in a particular field who is called to testify in legal cases. Their role is to provide objective opinions and insights based on their expertise, helping judges and juries understand complex issues. Expert witnesses can come from various fields, such as medicine, engineering, finance, or psychology. In court, expert witnesses present their findings and may be asked to explain technical details related to the case. Their testimony can significantly influence the outcome of a trial, as it helps clarify evidence and supports arguments made by either the prosecution or defense.