Kenneth Glad
True crime stories often captivate audiences, but the peak of this dark phenomenon hit American shores decades ago. Across the United States, a terrifying wave of violence defined an entire era of criminal history, leaving law enforcement scrambling for answers.
During the 1980s, the FBI tracked a record 823 active serial killers who claimed 361 lives in 1987 alone. Criminologist Robert Ressler noted back then that “serial murder has reached epidemic proportions.”
He added that “the types of crimes we see today did not occur with the same frequency before the 1950s.” Ressler had interviewed 36 convicted killers across two decades to figure out how they operated, hoping to give law enforcement a head start.
The term itself only entered American law enforcement jargon in 1974, writes HistorieNet, when Ressler used it during a lecture. Numbers eventually dropped to 724 active killers in the 1990s, and the last decade saw just 201.
Chilling real motives
Research shows these killers are rarely insane or highly intelligent, typically scoring slightly below average on IQ tests. Far from the genius criminal masterminds seen in movies, many struggled in school and showed disturbing signs in early childhood, including late bedwetting, arson, and animal cruelty.
Most suffer from a need for control rather than a pure sexual drive, gaining satisfaction from absolute power and violence over their victims.
Radford University professor Mike Aamodt points out in a study that early prison releases likely fueled the boom. His team manages a massive global database containing over 5,000 cases since 1900, with nearly 68 percent of those killers operating in the United States.
Loose parole laws played a major role during those peak decades. Over 80 percent of American serial killers spent time in prison before their first murder, and nearly 18 percent killed again after serving time for a previous homicide.
A sharp decline
To explain why these killers act, criminologists group them into four distinct motives. Power and control drive the vast majority, as offenders seek total dominance and sexual gratification through torture. Others act under severe mental illness, hearing voices or hallucinating orders from higher powers.
A third group operates on a self-assigned mission to eliminate specific populations, such as prostitutes, elderly citizens, or children. Lastly, thrill-seekers and cannibals kill purely for personal pleasure and the excitement of the act.
While notorious figures spread panic across California, the state ranks only seventh per capita despite recording 1,777 total victims since 1900. Regions like Alaska and Florida actually saw far higher concentrations relative to their population size.
Vanishing in the shadows
Since the 1990s, active cases have plummeted by 85 percent. Serial killings now account for less than one percent of all murders in the country according to federal data.
Serial murder researcher Enzo Yaksic notes that police now catch suspects before they reach three victims, the official threshold defining a serial killer. Decades of studying offender pathology allow modern investigators to spot behavioral patterns much faster.
Modern technology plays a massive role in this drop. Investigators now use advanced DNA profiling, mobile tracking, and better behavioral models to catch suspects after a single crime.
Yet, serious concerns remain hidden behind the numbers. Clearance rates for general homicides fell from 91 percent in 1965 to around 61 percent in 2017.
As Professor Aamodt warned, “There could easily be thousands of serial killers we do not know about, and whom we for one reason or another do not identify.”
Sources: HistorieNet, FBI, Radford University
