Serial killer is conventionally defined as an individual that through a longer period of time, murdered three and more people, and his intricate motive is psychological desire. Murders often have a sexual element, but can be driven by rage, greediness and with efforts to divert attention to them. Murders typically are linked with duplicate or similar way of accomplishment or common characteristic of the targets (occupation, race, sex or age). Though we are speaking about a phenomenon that dates back to the commencement of history, the appearance itself is comparatively new, it was first used in 1974 by FBI agent Robert Ressler. We are speaking about males (Caucasians), recluses and persons with above normalintellect. Discovering such persons, to law enforcement, frequently gives them great difficulties, as there is no reason and link with the victim. Discover what top 10 serial killers until today are still on the loose….