An eyewitness is a person who sees an event happen, particularly in the context of a crime or accident. Their observations can provide important details about what occurred, such as the time, location, and individuals involved. Eyewitness accounts are often used in legal settings to help establish facts and support investigations. The reliability of eyewitness testimony can vary, as memory can be influenced by many factors, including stress, lighting, and the passage of time. In legal cases, lawyers and judges may evaluate the credibility of an eyewitness to determine how much weight their testimony should carry in the proceedings.