A murder-accused policeman's fatal second shot into an Aboriginal teenager was not reasonable, an expert witness has told a Darwin jury.
Constable Zachary Rolfe, 30, has pleaded not guilty to murdering Kumanjayi Walker, 19, after the teen stabbed him in the shoulder with a pair of scissors on November 9, 2019.
Rolfe fired three shots into Mr Walker as he resisted arrest in a room at his grandmother's home in Yuendumu, 290km northwest of Alice Springs.
