Two of New South Wales’ most infamous criminals recently found themselves at the center of a brutal altercation inside Goulburn’s Supermax Prison.

Exclusive footage of the 2022 clash between these adversarial inmates has now been made available to 9News.

The incident began innocuously enough, with Talal Alameddine and an unidentified inmate appearing to take a casual walk together.

However, security cameras soon captured a stark shift in their demeanor as tensions escalated.

The two began to circle each other in the holding yard, launching into a flurry of punches and kicks, with one eventually landing a decisive blow.

Alameddine clutches at his bleeding neck before stripping down to his singlet and the fight resumes.

Guards break up the brawl and two shivs are found in the yard.

9News can’t reveal the identity of the man who was charged over the brawl because he was a teenager when he carried out the ISIS-inspired murder of a Queanbeyan service station worker in 2017.

He is serving a 27-year sentence.

Alameddine was jailed for 17 years for supplying the gun used to kill Curtis Cheng at Parramatta Police Headquarters in 2015.

Alameddine, now 33, was forced to go to court to give evidence about the prison brawl but claimed he couldn’t remember a thing.

“It was a bad period for me … I was zombied out … that medication, it zombies ya,” Alameddine said.

He was even shown the video.

“Obviously I’ve seen it, but to say how it happened or what happened, it’s hard for me to say.”

The charged inmate argued he was acting in self defence and the judge found him not guilty.

He is not eligible for parole until 2046, while Alameddine is not eligible until 2029.