Modus Operandi In criminal forensic behavioral analysis there are two identifiable criminal behavior that Modus Operandi and Signature. Modus Operandi and a criminal’s signature the two terms that have similarities however the terms represent totally different criminal behavior (van Gijn, E. L., Lamb, M. E., 2013). In general all criminals have Modus Operandi because this is someone peculiarities in behavior, however not every criminal have a signature which is a particular mark or stamp left to exemplify their presence on a crime scene. Let review the brief history of both terms. Let’s begin with the term Modus Operandi which means the particular way someone does something in the criminal justice system it is used to describe the “behavioral strategies criminals use to obtain and retain their victims†thing the criminal believes work (Bartol, Bartol, 2016). Everyone has habit or techniques they used to complete a task this is the same when committing a crime.