Serial killing

Late 20th century

The serial killing phenomenon in the United States was especially prominent from 1970 to 2000, which has been described as the "golden age of serial murder". The cause of the spike in serial killings has been attributed to urbanization, which put people in close proximity and offered anonymity. The number of active serial killers in the United States peaked in 1989 and has been steadily trending downward since, coinciding with an overall decrease in crime in the United States since that time. The decline in serial killers has no known single cause but is attributed to a number of factors. Mike Aamodt, emeritus professor at Radford University in Virginia, attributes the decline in number of serial killings to less frequent use of parole, improved forensic technology, and people behaving more cautiously. Claimed causes for the general reduction in violent crime following the 1990s include increased incarceration in the United States, the end of the crack epidemic in the United States, decreased lead exposure in early childhood and the legalization of abortion with the Roe v. Wade decision.