... eyewitnesses can only testify about what they have observed or what they know as fact. On the other hand, the expert witnesses may express opinion for what they possess special knowledge about a topic, or knowledge that the juror does not have. In past, the psychiatrists were only acted as an expert witness in courtroom for testing their reliability. However, nowadays, psychologists are gradually appointing in courtroom. Generally, psychologists have provided expert testimony on a number of different legal issues such as sentencing recommendations; the degree of psychological trauma suffered by a victim of violent crimes and the typical behavioral pattern of abused women and children. In addition, the mental state of a defendant, and whether he/she is competent to stand trial or was sane at the time of the crime was committed and the reliability of eyewitness testimony, etc. In this essay, it will describe approaching psychologists in courtroom for expert witness ...

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