I've seen enough body cam incidents to know the papers can say one thing and events revealed later by the footage depict another. General police guidance of use of lethal force is when there is an imminent danger to safety so it boils down to whether the kid charged a cop or a member of his family or not.
I've seen plenty of clips where the cops are in the wrong. Idiot cops firing pistols by accident or shooting in the absence of imminent threat. And that's why I support body worn cameras and full disclosure. Is is also why I am extremely skeptical of newspapers jumping to conclusions in the absence of the footage. It is very easy for relatives of the deceased to decry the cops as racist, or trigger happy and it be reported as such. And then the footage comes out and it shows something completely different.