
An in-depth look at the terrifying offenders whose crimes earned them rare life sentences; despite being imprisoned, these inmates go on to torture, kidnap and even kill.

At 18, Christa Pike commits a brutal murder and becomes one of the youngest ever women sent to death row.

After cold-blooded killer Leo Boatman murdered two campers, he went on the kill three inmates behind bars.

One of the UK's most infamous serial killers, Joanna Dennehy brutally stabbed three men to death.

James Robertson is one of the most feared men in the US prison system; he murdered his cellmate, attacked a prison employee and doesn't hold back from getting what he wants.