One Of The Men Behind Anita Cobby's Brutal Rape, Torture And Murder Bashed In Jail

A man involved in one of the most brutal murders in Australian history remains in hospital following jail attack.

One of five men jailed over the notorious killing of Sydney nurse and beauty queen Anita Cobby has been hospitalised after an attack in a NSW prison.

Gary Murphy, 61, was assaulted at the Long Bay Correctional Complex on Tuesday morning and was taken to hospital, a Corrective Services NSW spokeswoman said.

He was in a stable condition on Tuesday night.

Gary Murphy. Photo: Supplied

The CSNSW spokeswoman said they were helping police investigate and "a number of possible assailants have been identified".

It's believed Murphy had only been moved to Long Bay from Goulburn Correctional Centre within the last week.

Murphy was 28 when he was found guilty in 1987 of raping and killing Ms Cobby, along with his brothers Leslie and Michael Murphy, Michael Murdoch and John Travers.

Sydney woman Anita Cobby. Photo: AAP

Their crimes in February 1986 provoked public outcry and calls to bring back the death penalty.

Instead, they were all were sentenced to life in prison, never to be released. Michael Murphy died in jail in February of this year after reportedly suffering liver cancer.

Sydney woman Anita Cobby. Photo: AAP

Ms Cobby, 26, had been walking home from Blacktown train station when the men dragged her into a stolen Holden Kingswood.

They drove her to a secluded paddock where she was raped and beaten, then had her throat slit and was left to bleed to death.

Ms Cobby's father was given the horrifying task of identifying his daughter's body after it was discovered in a paddock two days later.