World's Most Evil Prisoners

Sent to prison after the torture and violent murder of a mother of six, Jamie Osuna is now awaiting trial.

While on trial for rape, 33-year-old Brian Nichols goes on a violent rampage that results in three murders.

The story of Tyler Davis Bingham, pretty criminal turned leader of the brutal and feared Aryan Brotherhood.

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

Edward Johnson was sent to prison for the brutal murder of a female friend, but the violence didn't end there.

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.

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.

Gary Vinter, in prison for double murder, stabs a fellow inmate in the eye and gives another brain damage.

James "Porky" O'Rourke's addiction to violence means he is one of the most feared men in the UK prison system.