I believe the final stamp on this story is the autopsy report (if it shows the angle of the shot and how close the kid was to the cop), and the toxicology report. If the kid shows weed and PCP in his system (my suggestion) then he was likely under some influence and not clearly able to think. It’s hard for a jury to find any way to convict the cop at that point.
I feel sorry for the kid. But stupidity and drugs...gets you dead.
Here you go... (A report on the official autopsy report)