Which countries have the most documented serial killers? The U.S. tops the ranking by a staggering margin with 3,803 identified cases.

Which countries have produced the most serial killers since 1900? Explore data from Radford University and FGCU tracking global case numbers.

The US is No. 1 — in serial killers. With a chilling 3,615 known serial killers to date, America has produced 66.2% of the world’s known serial killers to date — and outpace the next deadliest nations ...

What is one thing that all serial killers have in common? The answer is simple: they emerge from a complex interplay between ...

Editor’s Note: This story contains discussions of rape or sexual assault that may be disturbing. Reader discretion is advised. If you or someone you know has been sexually assaulted, you can find help ...

Researchers at the University of Bamberg have traced a darkly intricate form of narcissism in sexually motivated male serial killers, reporting that many offenders combine brittle sensitivity with a ...

In a 1991 taped call from jail, Aileen Wuornos told girlfriend Tyria Moore she would confess "to keep [her] from getting in trouble" The Netflix documentary Aileen: Queen of the Serial Killers — ...

From "Monster" to "Basic Instinct," these are the serial killer movies to check out after "The Lizzie Borden Story." ...

Mass murder is sometimes confused with serial murder by the news media and the public in general. Such confusion is not surprising. Up until 1974, criminal justice practitioners used the term mass ...