Constable Zachary Rolfe's first shot was unlikely to have stopped Kumanjayi Walker wielding a pair of scissors, a combat surgeon has told his murder trial.
The Aboriginal teenager died after Rolfe, 30, shot him three times during a failed arrest in Yuendumu, 290km northwest of Alice Springs on November 9, 2019.
Prosecutors say Rolfe went "too far" when he fired the second and third shots, which are the subject of his murder charge, because Mr Walker, 19, was "effectively restrained" by another officer.
