I feel obliged to point out that police often, if not always, treat a death as a homicide until evidence shows otherwise. As per the article, he was a known prankster and there was only a report of a single wound with no other evidence of foul play involved. At this stage, it is entirely possible that this was either a suicide or a sad accident.
Also, I rarely consider firearms marketing consultants as weapons experts; but that's just me. Either way, it's sad to hear of anyone dying, regardless of the cause.
However, I will say this: comments like this:
Are why some people shouldn't be allowed access to firearms.