
An in-depth look at some of the world's most dangerous murderers.

Keith Jesperson, known as the Happy Face Killer, brutally killed at least eight women across five American states in the early 1990s.

In 1999 and 2000, John Eric Armstrong cruises the streets of Detroit looking for sex workers.

A killer who goaded police and media during his spree, Heriberto Seda claimed to kill based on his victims' star signs.

The Alaska serial killer Robert Hansen who murdered at least seventeen women during a spree that lasted for more than a decade.