The article text provided does not contain the actual story content — only the Daily Mail website's navigation menu and a list of unrelated headline links were captured. No details about the reported shooting of a teenager in Greenacre, Sydney, are present in the supplied text, so a factual summary of the incident cannot be produced from this source material.

To provide an accurate, neutral summary of what happened, who was involved, and the circumstances of the shooting, the full article body would need to be retrieved separately, as the current extraction only returned sidebar content unrelated to the headline.