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Signature

Psychologically expressive behaviours that go beyond what's needed to complete the offence: posing the body, ritual acts, taking trophies, leaving messages. Signature is more stable than MO because it reflects underlying psychological needs.

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Related terms

Modus operandi (MO)Anonymous writing Behavioural consistency Behavioural distinctiveness BEOS Block-letter conversion CQT Crime Classification Manual (CCM)Criminal profiling Disguised writing FBI BAU Freehand forgery

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