How the state of South Australia decriminalised homosexuality

Half a century after the unsolved murder of a gay man in Adelaide, a performance at Sydney's Opera House tells the story of the killing and how its aftermath proved a catalyst for South Australia becoming the first English-speaking state in the world to decriminalise homosexuality.

Dr George Duncan was killed in May 1972. Photo:Supplied by SA Police.

As reported, Dr George Ian Duncan drowned after being thrown from a footbridge into Adelaide's River Torrens by a group of men on May 10, 1972.

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