A 17-year-old boy who had just shot another teenager said, "I'm going to make you really dead" as the victim lay unconscious on the ground, a judge has been told.
Prosecutor Tim Preston alleged the shooter had intended murdering three teenagers, but missed two of them when he repeatedly fired his pistol.
Mr Preston was opening the crown case on Tuesday at the South Australian District Court trial of the teenager, now 18, who has denied murdering Lewis McPherson, 18, on New Year's Eve last year at Warradale in Adelaide.
He also has denied the attempted murder of two of Mr McPherson's friends and alternative charges of endangering their lives.
Mr Preston said the issue for the judge, who is hearing the trial without a jury, was whether the teenager was so intoxicated he did not have the intent to kill.
His alcohol-blood level was estimated to have been 0.25 at the time of the shootings and he also had drugs in his system.
Mr Preston said the teenager had returned to the shooting scene where Mr McPherson was lying unconscious in the ground.
The teenager walked up to him and pointed the pistol at his abdomen saying: "If you don't stop being dead, I am going to make you really dead".
The trial is continuing.