Forensic psychology is a subspecialization of clinical and legal psychology that cooperates with the justice administration, helps it to make decisions, and investigates and intervenes in the behavior of actors in the field of law and justice. This manual, a classic of this type, brings psychologists, lawyers and other professionals closer to the complex mental framework that sustains phenomena such as serial crime, traumatic events and their consequences, the relationship between personality and criminal behavior, the biological factors involved in violent behavior or the relationship between mental disorders and crime.