Expert Law Witness

Expert witnesses are used in trials where there is the need for clarification or documentation by an objective expert in a particular field pertaining to the case. It is the duty of an expert witness to make a commentary on the case based not on his or her personal opinion but by using his or her professional expertise to come to a conclusion. Expert witnesses are almost always noted authorities in their field.

One of the most common types of professionals called to the stand as expert witnesses are psychiatrists. Because so many cases involve psychological underpinnings, oftentimes psychiatrists are needed to clarify complex mental assessments. For example, in many criminal cases, the prosecutor must prove that the defendant had intent to harm. Many defendants who are charged with murder, rape or assault will claim a defense of temporary insanity. In such a case, an expert witness psychiatrist may be called in to make a judgment based on professional opinion.

Other types of expert witnesses include therapists, technology experts, doctors, scientists, mechanical engineers, and law enforcement officers. Many academics who have become scholars in their field are asked to serve as expert witnesses, especially scientists and social scientists. In family law, sociologists, social workers and others are called to testify on the dynamics of a healthy family.

Many top law firms and federal offices keep databases of highly regarded expert witnesses. There are also several dozen companies dedicated to finding and providing expert witnesses for trials. Some of these companies are included in Inc. or Fortune 500 listings, attesting to the growing demand for expert witness services.

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