Muir's father was dogger Peter Muir, who gave the important sacred and archaeological site Serpent's Glen, in the Little Sandy Desert, its name. Muir spent 16 months in the area around the Carnarvon Ranges (also known as Katjarra) in 1962, and gave the first written account of the rock art at Serpent's Glen, now known as Karnatukul. He also named Billycan Spring. He married Daisy, an Aboriginal woman, and had sons Talbot and Kado.[3]
He is a fierce advocate for the rights of Indigenous Australiansinland rights,[6] protecting heritage,[7] and recognising the value of traditional knowledge[8][9] and cultural expression, and has researched and published on Australian Aboriginal heritage and native title.[5][10]
In 2018, together with his wife Deeva, Muir painted a mural called Reti on the wall of Kalgoorlie Police Station. Reti (English name Empress Springs) is a significant cultural site in Great Victoria Desert, and is situated on land subject to a native title claim.[14]
In 2022 he has led workshops to make rugs made of recycled fabric for a cross-cultural art project called Reclaim the Void, created by Ngalia elders and others under the direction of Muir and Vivienne Robertson. The rugs will be joined, creating a huge textile artwork depicting the story of the Tjukurrpa of the country where gold mines have been dug, and intended to comment on both the desecration of the land and the over-consumption of society. The work will be displayed in the Western Australian Museum.[15][16]
Muir is married to artist Deeva Muir, who was born in Malaysia and has a Sri Lankan Tamil background.[20] Their eldest son Karthi is an actor who trained at the Western Australian Academy of Performing Arts; his younger brother Kuberan is an artist, as of 2019 in his second year of a degree in photography at Curtin University; and younger sister Ammbigai is also a visual artist.[21]
^"ACMC members - Department of Indigenous Affairs". Department of Indigenous Affairs (WA). 27 March 2008. Archived from the original on 12 September 2009. Retrieved 20 July 2022. ACMC [Aboriginal Cultural Material Committee] Member - Specialist Anthropologist
^ abc"Our Board". National Native Title Council. 23 September 2020. Retrieved 20 July 2022.