Born to Kill?

The love affair between Gerald and Charlene Gallego resulted in a trail of merciless rapes and murders across three states from 1978 to 1980.

Antone Charles 'Tony' Costa was a Massachusetts carpenter who achieved notoriety for killing four women in 1969 - but his crimes began much earlier. Did his upbringing influence his violent tendencies, or was he simply born to kill?

Richard Cottingham earned his nickname 'the Torso Killer' by dismembering NY sex workers in the 1960s-1970s.

In 1990, the Clairemont area of San Diego was left terrified for its safety as ruthless serial killer Cleophus Prince Jr. stabbed six women to death in their homes.

Robert Napper's shockingly savage serial murders of three women and a child in South East London left the nation in shock.

Levi Bellfield targeted women using public transport in London and the surrounding areas, killing three - though he is suspected of many more attacks.

Sean Gillis callously took the lives of eight women in Louisiana in order to satisfy his sickening desire to manipulate their corpses. This egomaniac killer raped, murdered and mutilated eight women in the local Baton Rouge area from 1994 to 2004.

Women in Virginia were told to nail their windows shut in order to protect themselves from the Southside Strangler, Timothy Spencer.

Childhood friends John Duffy and David Mulcahy shared many common interests, but as they got older these took a darker turn - resulting in brutal rapes and murders in the 1980s.

Cousins Waterfield and Gore hunted women in Vero Beach, Florida. Their perverse and violent acts resulted in the sexual abuse and murder of six young women before Gore was finally caught.

California state parks became scenes of violence in 1979 and 1980 as convicted rapist David Carpenter took his crimes to new and diabolic levels.

Bobby Joe Long was a brutal and ruthless killer who terrorised women in Florida before his arrest in 1984, when he claimed to have also raped over fifty women.