The specialty area in psychology that applies psychological principles and techniques to legal issues, such as the assessment and treatment of offenders, mental competency to stand trial, child custody, jury selection, and eyewitness testimony is called:

Forensic psychology

Explanation:

Forensic psychology is the discipline which is the combination of psychology and legal system. In other words the application of psychology for the purpose of law is called as forensic psychology.

It focuses on the application of psychological theory to understand the purpose and mind set of the culprit for commission of crime. It is related with the psychological treatment of the offenders, understanding the child's psychology in the cases of custody, selection of jury and mental setup of the eyewitness while providing the testimony.

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