
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.

Feared Aryan Warriors gang leader 'Mugsy' Williams was a one-man crime wave - even behind bars.

After murdering his aunt and uncle, Ramon Escobar rampages across L.A. and strangles his cellmate in prison.

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

His time behind bars only made Italian-American mobster Freddy Geas even more brutal.