A criminal psychologist is a professional who studies the thoughts, feelings, and behaviors of individuals involved in criminal activities. They apply psychological principles to understand why people commit crimes and how to prevent such behavior. Their work often involves assessing offenders, providing expert testimony in court, and helping law enforcement agencies develop strategies for criminal investigations. These psychologists may also work with victims of crime, offering support and counseling. By analyzing patterns of behavior, they contribute to the development of criminal profiles, which can assist in identifying and apprehending suspects. Their insights are valuable in both legal settings and rehabilitation programs.