In a dusty campsite in central Australia more than 30 years ago, a mother's cries of "a dingo's got my baby" set the stage for one of the country's most intriguing murder mysteries.

The final scenes are set to be played out in court on Friday when a coroner will hear new evidence that her parents hope will once and for all confirm Azaria Chamberlain's official cause of death.

"We want a finding that Azaria was taken by a dingo," said Stuart Tipple, the lawyer representing Lindy Chamberlain-Creighton and her former husband Michael.

"There is a lot of new evidence. The last inquest was in 1995 and since then there have been a number of significant dingo attacks," Tipple said.