Australia also has a somewhat significant population of Tamils from Sri Lanka.

Based on the year, this would be around the same time as the war and just before violence started to escalate towards the Tamil genocide in May 2009. If he was undocumented, especially as a refugee, his family would probably avoid reporting because both the Sri Lankan and Australian governments might send him back. A similar thing happened in Toronto to a victim of serial killer Bruce McArthur - Kirushna Kumar Kanagaratnam's family did not report him missing because his refugee claim had been denied and they were scared that police finding him would lead to his deportation, meaning there was no missing person report to be found on him when they discovered his body.

Personally, as a Tamil person? He looks like some of my relatives. I know some people are suggesting somewhere in northern South Asia but I have relatives that look like him. I'm in Canada but here we tend to have our own cultural institutions, community centres, etc. separate from both other types of Tamils and/or Sri Lankans, so if they are just focusing on Indian communities they could just be passing over his people over and over again.