Expert critical of WA murder weapon theory

Updated July 23 2019 - 7:48pm, first published 5:26pm
Robyn Austic says pathologist Dr Richard Shepherd was "fabulous to listen to".
Robyn Austic says pathologist Dr Richard Shepherd was "fabulous to listen to".

The forensic pathologist who re-examined Princess Diana's body for an inquiry has weighed in on the murder of a pregnant woman in Western Australia, telling an appeal hearing the knife could not have caused her injuries.