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

Nurse Charles Cullen secretly killed patients for years while avoiding scrutiny.

A 23-year-old killer murders 17-year-old former head girl Georgia Williams in 2013.

A serial killer and rapist who murdered at least 23 men and boys, this is the little-known case of Ronald Dominique.

Fritz Honka killed four prostitutes in Hamburg during the early 70s.