A 45-year-old man has died after he was involved in a single vehicle rollover near the community of Finke on 27 August 2016.
Superintendent Janelle Tonkin said the man died on 3 September. A 44-year-old woman was killed in the same incident.
Police will prepare a report for the Coroner.
The road toll is now 29, compared with 34 for the same time last year.