The source material explores the complex topic of the apparent decline of serial killings, particularly in developed nations, while questioning whether this trend is genuine or merely a shift in criminal behavior and detection methods. It establishes the FBI’s definition of a serial killer and presents criminological data showing that the number of active offenders has significantly dropped since the peak in the 1970s and 1980s. The episode attributes this decrease to several factors, including advancements in forensic technology like DNA profiling, improved law enforcement coordination through programs like ViCAP, and societal changes that limit potential victims' vulnerability. Furthermore, experts suggest that modern serial killers have adapted to avoid traditional detection by targeting fewer victims, operating in specialized environments like healthcare, or exploiting new digital avenues, making global data on the subject less conclusive.
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