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In 1957, while Papua New Guinea was an Australian territory, Aro, then a young man, walked into a hospital "carrying a baby and a blood-stained axe" and stated that he had killed his two wives.
There were no further executions. The death penalty was abolished in 1970, five years before Papua New Guinea's independence from Australia. It was reintroduced in 1991, but never applied.
- "PNG urged to abandon death penalty", Australian Broadcasting Corporation, 12 November 2007