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

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 ...

The United States holds the unsettling title of the world’s serial killer capital. A new ranking reveals where cases are most concentrated. The chances of living next door to a serial killer are slim, ...

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 ...

While at least one serial killer has been identified in each U.S. state, some breed these notorious killers more than others. Washington state recently ranked among the deadliest “serial killer ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

There's a new exhibit in Seattle that's not for the faint of heart. Mind of a Serial Killer: The Experience, is now open at Pacific Place in Seattle.

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