Don Dale Youth Detention Centre in Berrimah, NT. (AAP Image/Four Corners)
A former Northern Territory youth prison guard has admitted to jokingly asking detainees to perform oral sex on him, urging a child to eat faeces and filming a boy urinating.
Appearing before the juvenile justice royal commission, former Don Dale Detention Centre Youth justice officer Conan Zamolo said he was "just mucking around" when he dared a child to "eat shit" and posted the footage on social media app Snapchat in 2014.
"It's just the kids goofing around. Something to pass the day," Mr Zamolo told the inquiry's Darwin hearing.
"I can see now it was inappropriate."
Another clip filmed by the guard late at night shows a boy hiding under his sheet in his cell when Mr Zamolo calls out and makes a reference to fellatio.
"I was actually just going to say goodnight to them because I was leaving shift," Mr Zamolo said.
"I knew they'd take it as a joke, or I just assumed they would take it as a joke."
Other vision filmed by Mr Zamolo showed a boy looking uncomfortable while urinating in a toilet late at night, when the guard says "Oi, what are you doing, you little gay dog?"
The guard was never disciplined for any of those incidents, but was later sacked for an unrelated matter.
Mr Zamolo rejected allegations from three separate detainees that he recorded a child masturbating in the shower.
The inmates claimed they saw vision of a naked boy on Mr Zamolo's phone, but he said he only led them to believe he had done it.
Police investigated the claims but the bodybuilder was only charged with steroid possession.
A youth prison inmate also gave evidence on Monday, stating guards bribed kids to fight each other for junk food.
The current Don Dale detainee, identified as BN, told the inquiry officers induced young offenders to attack each other in areas without CCTV cameras, offering chocolate and cigarettes in return.
"Some guards had favourite detainees. They were the detainees who had fought someone that the guards didn't like," the inmate said.
The youth was allegedly put in solitary confinement for six weeks, assaulted and transferred to an adult jail for three weeks as punishment for escaping.
Mr Zamolo told the Children's Commissioner that a female guard once kicked a 13-year-old detainee in the guts and called her a "f***ing slut", while another worker called a boy a "stupid black c***" for taking too long for a toilet break.
Mr Zamolo was on duty when six boys were tear gassed in August 2014 after one escaped from solitary confinement and began trashing an exercise yard with a fire extinguisher.
He denied he was involved in the gassing decision and admitted a report filed with police claiming that five escaped detainees had assaulted guards with shards of glass, bricks and steel poles was inaccurate.
Mr Zamolo said he also witnessed fellow ex-guard Ben Kelleher angrily attempting to cover a camera and swearing at former inmate Dylan Voller while standing over the cowering boy on his bed.
"I was there if it got out of control," Mr Zamolo said.
"If Ben attacked Voller, we had to get Ben off Voller... that's why I asked another guard to assist."
© AAP 2017