Indigenous Australians, please be aware the following material contains the names and stories of Indigenous Australians who have died. I recognise the traditional custodians of the land where these interviews were recorded, the Wakka Wakka, Jarowair and Barrumgum tribes, and where I live, work and study, the Turrbal people. Peter Gray looks like every other older bloke at Kingaroy Woolies. He's unassuming, a little bit shy, and very slight....