A police officer identified a child sex offender to a bikie while both men were locked up in the Adelaide City Watch House, the day before a violent shower block attack, a court has heard.

Key points: Rebels bikie Bradley Daniele pleaded guilty to assaulting Hamzeh Bahrami

Rebels bikie Bradley Daniele pleaded guilty to assaulting Hamzeh Bahrami Bahrami sexually assaulted a 10-year-old girl in a Blair Athol public toilet

Bahrami sexually assaulted a 10-year-old girl in a Blair Athol public toilet Daniele's lawyer said his client was "shocked" by Bahrami's crime

Rebels bikie Bradley Daniele, 26, has pleaded guilty to assaulting Hamzeh Bahrami in April last year.

Bahrami has been convicted of sexually assaulting a 10-year-old girl multiple times in a Blair Athol public toilet earlier that month.

Bahrami's crime attracted significant public attention at the time and sparked a two-week-long manhunt.

In CCTV footage posted by Daniele to his own social media account, Bahrami can be seen showering in a cubicle before he is confronted and assaulted.

After about 20 seconds, a police officer walks into the room and deploys pepper spray into the shower cubicle in a bid to stop the attack.

At the time the footage was uploaded, Daniele said he would "do [it] over and over again if [he] had the chance" because he would not "stand for kids being abused".

The CCTV footage was posted on social media by Bradley Daniele. ( Facebook: Bradley Daniele )

The Adelaide Magistrates Court on Thursday heard a police officer working at the Watch House pointed Bahrami out to Daniele the day before the incident.

"SAPOL have been advised of the comments from Mr Daniele's solicitor made today and as a result we will be making inquiries with respect to them," SA Police said in a statement.

"We have no further comment at this time."

Attack was not premeditated, defence lawyer says

Daniele's defence lawyer Andrew Graham told the court his client became upset when he found out he was being detained with Bahrami.

"A lot of the community were shocked by [Bahrami's] offences, but particularly Mr Daniele," Mr Graham said.

He told the court Daniele had grown up in the northern suburbs, and that his late father had been involved with a football club at the Blair Athol park where the young girl was attacked.

But in sentencing submissions, Mr Graham stressed it was not a "premeditated" attack.

"Ordinarily, vigilante justice involves some sort of premeditation," he said.

"It's a completely different situation here.

"He wasn't out in the community looking for trouble — he was detained [and] confronted with this person who had committed these abhorrent crimes.

"It's unclear why [the two men] weren't separated."

Hamzeh Bahrami sexually assaulted a 10-year-old girl at Blair Athol. ( ABC News )

The court heard Daniele had a long criminal history, which his defence lawyer partly attributed to his father's death when he was 17 years old.

Prosecutors told the Adelaide Magistrates Court the assault "spoke for itself".

South Australian Police Commissioner Grant Stevens last year explained how the footage made its way onto Daniele's social media page.

On Thursday afternoon, Daniele's overall jail term was increased by more than four months, and his non-parole period by two months, meaning he won't be eligible for release until late this year.

He will serve the new sentence in addition to a more than year-long term he's currently serving for other offences.

Magistrate Rodney Oates said it was "not the role of any person to [bring] justice to another person".

"It is perhaps remarkable how the events unfolded to allow the defendant access to the victim in this case," he said.