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An item taken from the crime scene by the offender, kept as a memento of the crime.

Behavior(s) that fulfill the offender's emotional and psychological needs and often go beyond what is necessary to commit the crime.

The study of victim characteristics, such as lifestyle and demographics, to understand the selection process of the offender.

Evaluating the potential danger an offender poses to the public or specific individuals based on their history and characteristics.

An investigative support technique that uses crime location data to make inferences about an offender's residence or base of operations.

A location that an offender uses as a base to commit crimes, often relating to their home, workplace, or social venues.

An investigative technique used to infer characteristics of a criminal based on the nature of the offense.

The method of operation or particular way a criminal commits a crime, often evolving over time.

A systematic and analytical process used by the FBI that combines all known aspects of the perpetrator and the crime to develop a behavioral composite.

A type of criminal who plans their crimes extensively, often targeting specific victims, and takes steps to avoid detection.

Classification of offenders into distinct profiles based on their behaviors and motives.

The failure to recognize or establish the connection between two or more related crimes, often due to lack of information sharing between law enforcement agencies.

The time that elapses between successive crimes committed by a serial offender, which can vary greatly.

The degree to which an offender's behavior remains the same across different crimes, used to identify signature behaviors and Modus Operandi.

The intentional alteration of a crime scene prior to the arrival of law enforcement for the purpose of misleading investigators.

When an offender demonstrates knowledge of investigative techniques and evidence collection, often trying to avoid detection.

A type of criminal who acts impulsively, leaving a chaotic crime scene and usually little planning or effort to avoid detection.

The methodical approach to understanding the dynamics of a crime by examining and interpreting the physical evidence and reconstructing the sequence of events.

The principle that different crimes ascribed to the same offender display comparable levels and patterns of behavior.