From ancient times to the present, serial killers have terrorized the public, claiming their victims with a variety of methods, including poisoning, stabbing, and shooting. Modern law enforcement agents have developed sophisticated techniques, such as DNA analysis and psychological profiling, to track and identify these killers. Covering key historical and contemporary cases, Serial Killers is a concise, objective introduction to this field of criminal investigation. This book includes such chapters as: Murder by Numbers; Monsters Among Us; Lethal Ladies; Still at Large; and, The Mind hunters. Cases covered include: Erzsebet Bathory; the Beltway Snipers; David Berkowitz, a.k.a. 'Son of Sam'; John Wayne Gacy; Micajah and Wiley Harpe; Jack the Ripper; Herman Webster Mudgett, aka 'H.H. Holmes'; Gary Leon Ridgway, a.k.a. 'The Green River Killer'; and, Aileen Wuornos.