Apprehending the “ordinary” criminal is sometimes an exhausting yet surprisingly straightforward process, involving chasing down all pertinent clues and establishing a rational motive for the crime, which often helps lead to the correct perpetrator. It is the seemingly motiveless crime that presents a more difficult and complex conundrum: How can law enforcement pinpoint an unknown subject whose acts appear utterly random and irrational to any sane observer?

One method of describing such subjects is criminal profiling. Perhaps more art than strict science, profiling is based on careful observation of physical evidence, the deduction of specific evidentiary patterns, and the extrapolation of those patterns into a relatively detailed description of the behavioral and psychological characteristics of a possible perpetrator.

The track record of profilers is far from perfect, and some detectives find profiling to be sometimes more of a hindrance than a help. Still, criminal profiling has been amazingly accurate in many cases, and has assisted in the apprehension of some of the world’s most vicious serial killers and rapists by considerably narrowing down the number of likely suspects in a given case.

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