Arson

This chapter examines arson as a criminal act involving the deliberate ignition of property to cause damage, conceal other crimes, or pursue financial, emotional, or ideological goals. It outlines key modus operandi (MO) variables – such as accelerant use, ignition devices, timing, and target selection – that reveal offender intent and link seemingly isolated incidents. Offender motivations include insurance fraud, revenge, thrill-seeking, and political violence, with behaviors ranging from impulsive acts to highly organized operations involving reconnaissance and the disabling of safety systems. The chapter details technical aspects such as incendiary methods, placement of ignition points, and tools or fuels employed, while highlighting indicators of professional versus amateur firesetting. It explores offender typologies – serial and firefighter arsonists, financially motivated offenders, gang-related actors, and juveniles – and identifies behavioral markers like returning to fire scenes or displaying fascination with fire. Psychological factors, including antisocial traits, personal crises, and ideological extremism, are analyzed alongside post-incident responses. Practical guidance emphasizes forensic evidence, interagency collaboration, and comparative analysis of incidents to distinguish deliberate arson from accidental fires and to identify serial patterns.