I saw the video. Apparently a bullet from the gun killed him. What's confused you.
Oh? Did some bullet magically appear out of nowhere or did someone shoot him for a reason?
But a root cause analysis is a very stringent robust process. It's what your airline industry uses so don't mock it. It is the pinnacle of seriously addressing critical incidents with evidence based solutions that don't just skim onto trivial answers.
If we're talking about procedural or mechanical failures....I bet it's real effective.
If we're talking about human behavior, probably less so.
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