the narrow definition of profiling is the description of the characteristics and traits of the unknown offender. the type of profiling pioneered by the fbi is the retrospective look at crime. in other words, crime has occurred. we are now examining the crime, the crime scene, all of the todence related to theat draw logical inferences about who might have committed this crime. host: the difference between prospective profiling in retrospective profiling. those are often confused. perspective profiling is trying to prospective a profiling is trying to identify common characteristics to determine who might commit a particular crime, who might be a terrorist or a drug courier. that is far more problematic, because you are going to get a lot of false positives, people who fit the profile who really are not a terrorist or card career host: what type of agencies are doing that work? guest: certainly tsa, homeland security, and the bureau is looking at this to see what logic