An Adelaide man who admitted filming himself sexually abusing children in Cambodia before publishing the videos online has had his jail sentence increased.
Geoffrey William Moyle sexually assaulted multiple children in Cambodia between 2002 and 2005, and was arrested after being tracked to a location in Australia.
He was originally jailed for just under nine years with a non-parole period of four years and six months.
But in a judgment on Wednesday, SA's Court of Appeal overturned the sentence and jailed the 48-year-old for 12 years with a non-parole period of seven years.
The court found that his original sentence did not adequately reflect the seriousness of the offending and the harm suffered by each of the victims.
"Moreover, the victims of Mr Moyle's offending are not limited to the nine victims of each of the offences of which he was convicted," the judgment said.
"Mr Moyle's participation in the commercial exploitation of children played its part in supporting the ongoing trade of those who peddle in the misery of children."
Moyle came to the attention of authorities in 2009 through a US investigation into an online bulletin board used to advertise and distribute child exploitation material.
He went by the name Waka with the US investigation later linking that user to an address in Phnom Penh.
In January 2015 Moyle posted comments on the board and uploaded photo albums on a different website.
The Australian Federal Police matched the IP address used at that time to his home in Australia and he was eventually arrested in May 2019.
AFP officers subsequently reviewed Moyle's internet activity, suspecting he was the male depicted in the videos and images which he had posted.
A forensic procedure, which involved photographing the respondent's body and making comparisons with the videos, confirmed it was him.
In their judgment, Justices Chris Kourakis, David Lovell and Sam Doyle said sex crimes committed overseas would generally not have an element of breach of trust which often accompanied offending committed locally in domestic and institutional settings.
"On the other hand, opportunistic participants in that trade can have no empathy for the suffering of the victims," they said.
The judges said the exploitation of vulnerable children in developing countries deserved equal condemnation.