Sky worker Billy Dawson had been with colleagues at the Viaduct during their busy Rugby World Cup coverage on October 7 when he was punched during an altercation at the Viaduct.
The death occurred outside Spy Bar, close to Party Central.
It is understood he suffered a brain injury caused by the force of the punch to his face. He also hit the back of his head when he fell.
He died hours later in Auckland Hospital.
Murray had been charged with assault but police have since upgraded the charge to manslaughter.
Two other men, Mona Christo Feterika and Antoni Te Moko Roger, have been charged with assaulting Mr Dawson.