This encyclopedia explores in depth what makes somebody to commit a crime, and how they react to the crime on the run or in court. It mentions that criminal psychologists are usually invited as witnesses in court cases to assist the jury in understanding the criminal's thinking. The Encyclopedia defines criminal conduct as "Any anti-social behavior punishable by law, but can be regulated by the community." It emphasizes that there are subtleties between what can be considered okay, and what isn't acceptable. A particular activity may be considered a violation at some point in time, but then be approved by the community later on. The encyclopedia discusses the application of criminal psychology to different types of crime, such as murder, bullying, and violence. It mentions the process of crime profiling, in which a criminal psychologist draws a list of characteristics that criminals may exhibit in order to identify them among ordinary persons. When comparing these similar characteristics (such as physical characteristics, education level, and geographic area), criminal psychologists can better comprehend the motives of criminal behavior. The encyclopedia suggests that there are different types of criminals, such as those motivated by personal ambitions, and others influenced by social factors or family background. The encyclopedia of criminal psychology seeks to explain how the criminal mind works.