C

ontrary to popular belief among many of the BAU, Reid does not know everything. He does not know how to shoot very well as he has just failed his latest firearms qualification. His lack of shooting skill is in marked contrast to the man the BAU are tracking and who the FBI coin a L.D.S.K.: long distance serial killer. In Des Plaines, Illinois, an expert marksman, unseen and in various seemingly unconnected locations during the middle of the day, has been shooting multiple people from a long distance. The target is always shot in the abdomen, all but one of the victims thus far having survived. The BAU determine that the marksman is purposeful in where he shoots his victims. Beyond a basic profile, they know that he has had specialized gun and shooting training. This means that he was, or still is, a police officer, news that does not sit well with the Des Plaines Police Department who are assisting on the case. Gideon comes up with a theory on the middle of the day shooting times. However, it isn't until Garcia can come up with a geographical profile that the BAU can get closer to finding their man.

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