World's Most Evil Killers

After striking up a friendship, Stephen Unwin and William McFall's release had consequences.

Experts looks back on the crimes of John Cannan as he moved in and out of prison.

Exploring a teenage murder case highlighting the many dangers of online grooming.

A convicted killer serving life for manslaughter is found guilty of committing a second murder.

Manipulative, psychopathic and callous, church warden Ben Field killed Peter Farquhar.

A family's worst nightmare occurs when 16-year-old goes missing, and is found dead days later.

A fugitive from the United States murders one British police officer and tries to kill two more.

A manipulator is accused of the murder of his wife and is eventually caught out by a polygraph test.

Ian Stewart receives a second conviction for the death of his wife.

Zahid Zaman portrayed himself as a pillar of the community but the story of this killer is sinister.

Anthony Allen Shore was matched to four murders after his arrest for a different crime.

A career criminal, Charles Albright was notorious for keeping eyes as trophies.

The notorious story of a man convicted of the murder of two young girls.

The story of a killer who was infamous for his whimpering confessions over the phone.

Responsible for five murders, Joshua Wade avoided justice for years and later confessed.

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

A man who terrorized Phoenix in an extensive year-long crime spree, committing nine murders.

The Alaska serial killer Robert Hansen murdered at least 17 women.

Paul Runge was a killer who found some of his victims through ads.

The case of Ronald Dominique, a serial killer and rapist who murdered at least 23 people.