
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.

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.

Imprisoned after a fatal robbery, Craig Wissink kills a corrections officer in a brutal attack.

Feared L.A. crime boss Ezequiel Romo ruthlessly runs the streets of L.A., even from behind bars.

Nearing the end of a lengthy prison sentence, Curtis Watson does the unthinkable.