World's Most Dangerous Prisoners

James O'Rourke grew up in the Glasgow gangs, if there was a violent crime in his hometown, he was probably there. By his early 20s he'd graduated to murder, but his violent nature really blossomed after he was sentences to life in prison.

Gary Vinter is a convicted double murderer. Now behind bars, he is one of the most feared men in the English prison system. He is a thug for hire, who stabbed a fellow inmate.

James Robertson is one of the most feared men in the Florida prison system. He murdered his cellmate and attacked a correctional officer to get his wish - to be put on death row.

Mark Hobson is a notorious British spree killer who murdered twin sisters,and an elderly couple in their own home.Behind bars he is no less brutal.

One of the UK's most infamous serial killers, Joanne Dennehy stabbed three men to death over ten days, and attempted. When securely locked behind bars the public are safe.

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

At 18, Christa Pike commits a brutal murder & becomes 1 of the youngest women ever sent to death row.

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

While on trial, 33-year-old goes on a violent rampage inside the courtroom that ultimately leads to three murders and a state-wide manhunt to apprehend him. Once incarcerated, he cultivates a violent reputation within the prison walls.

Nobody is safe around Jaime Osuna. Sent to prison after the torture and murder of a mother of six, he was then put on trial for one of the most gruesome murders to occur in a US prison.

Feared Aryan Warriors gang leader 'Mugsy' Williams was a one-man crime-wave. His violence ultimately sparked a bloody showdown in a Nevada jail, leaving multiple inmates dead.

Remorseless murderer Casey Pigge's main ambition is to be the ultimate serial killer. Unrestrained, he remained a deadly threat, resulting he killing his cellmate.

Imprisoned for murdering a woman and her 14-year-old teenage son, Denver Simmons violence only spiraled further.

Violent armed robber Michael Dutcher brutally murdered two people while attempting a prison escape in Iowa. He remains a threat to anybody who stands in his way.

Having committed over 27 assaults whilst incarcerated, Billy Tracy is one of the most violent offenders on Texas death row, since on his attacks resulting the death of an correctional.

One of the most feared men in US prison history, Thomas Silverstein became a gang leader for the Aryan Brotherhood on the inside. After savagely killing multiple inmates and a correctional officer, he spent 36 years in solitary confinement.

Jesse Con-ui's loyalty to the New Mexican Mafia drove him to betray and murder his former mentor

Sadistic convict Leo Boatman is lethal on both sides of the bars. After the cold-blooded murder of two young campers in a Florida national park, he went on to kill a fellow inmate.

Nothing was going to stop Ricky Dubose from breaking free of prison. Whilst being transported on a bus between facilities in Georgia, he killed two correctional officers before escaping.

Craig Bjork's series of murders are described as one of the worst cases of mass murder that the city of Minneapolis has ever seen. After killing two women and both of his children, he remains a dangerous threat - even behind bars.

After shooting two people, Rodney Berget kidnaps and sexually assaults a gas station clerk. South Dakota prison struggles to contain him. His final attempt involves the sadistic murder of a corrections officer.

Convicted of 22 felonies, Miti Maugaotega Jr. receives one of the longest prison sentences in Hawaii history. Behind bars, he joins a prison gang and becomes a tornado of death and destruction.

Nearing the end of a lengthy prison sentence, Curtis Ray Watson does the unthinkable: he sexually assaults and murders a prison administrator in West Tennessee State Penitentiary, before escaping and going on a four-day run.

Feared crime boss Ezequiel Romo ruthlessly runs the streets of L.A. - even from behind bars. Leading the Blythe Street gang from his cell, coldly ordering the murders of anyone who stands in his way.

Imprisoned after a botched robbery that ends with the fatal shooting of an innocent man in Fayetteville, North Carolina. Craig Wissink later kills a corrections officer in a brutal attack.

Willing to kill for just $20, Joshua Dewayne Gardner commits his first murder at 24 in Hernando County, Florida. Even behind bars, he can't contain his rage, brutally beating a fellow inmate to death.

Born into a notorious family, Erica Jenkins goes on a murder spree in Omaha, Nebraska that shocks the nation. Behind bars, she continues her streak of violence, attacking corrections officers and hospitalizing inmates.

Rocky Beamon lures a woman into the woods outside Naples, Florida, and drowns her there. Once in prison, he brutally kills two fellow inmates - and vows to kill again.

After murdering his aunt and uncle, Ramon Escobar rampages across Los Angeles, bludgeoning five strangers with a baseball bat and bolt cutters. Even prison cannot stop him - he strangles his cellmate.

After being linked to more than 100 robberies, Mikel Brady shoots an interstate trooper and later leads a violent prison escape attempt with three accomplices, killing four staff members before being recaptured.