Robbery suspects are people with habitual ways of speaking and specific verbal styles that may be repeatedly used when committing crimes. One may identify a robbery pattern by including these variables for analysis.
Sometimes a suspect uses the same phrase in crimes, such as "I am sorry to do this" or "Get down on the floor, motherf****r." This reuse of a phrase, along with other similar modus operandi variables, can help one infer crimes are related to one another.
From the book Elements of Crime Patterns:
Speech/Voice: did not speak, flat affect, foreign accent, high-pitched voice, lisp, loud, monotonous, mumbled, nasal, quiet, regional pronunciation or accent, slurred words, soft-spoken, sounded drunk, sounded high, sounded intoxicated, stuttered, talkative, talked quickly, talked slowly, whispered, used profanity, used quotable statement, used unique words, used unique phrases
Verbal Demeanor: apologetic, commanding, concerned, complimentary, demanding, derogatory, ego-satisfying, hostile, inquisitive, knowledgeable, negotiating, nervous, neutral, personal, polite, profane, reassuring, rude, self-demeaning, threatening
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