In criminology, a disorganized offender is a type of serial killer classified by unorganized and spontaneous acts of violence. The distinction between "organized" and "disorganized" offenders was drawn by the American criminologist John Douglas and Roy Hazelwood.[1] These profiles were also studied and modified in the FBI's Behavioral Science Unit located in Quantico, Virginia. By classifying these offenders into different categories, the FBI is able to track down offenders by studying their behavior and habits.[2]