Sig P320 Gun Uncommanded Discharge
youtube.com
youtube.com
And to be clear: they murdered him and as far as I can tell, none of them are facing any murder charges.
Is that really how it works in USA? A belief that an incapacitated person fired an accidental shot is grounds for murder and execution? It is technically a murder even if those people legally have immunity, in the same way as the 1930s nazis committed crimes even though they were legal in their country.
Yes (as written by the person you're quoting; your rephrasing misses the point), and it most likely works that way in your country as well. Even if it's legal where you live to carry firearms in public, I would strongly encourage you to read up on how it works in your area before doing so. Especially if you can remotely imagine yourself ever doing anything that could possibly be grounds for an arrest, including for political protest purposes.
Wow. It absolutely does not. What the fuck?
Please tell me what country it is, so I can confirm for you.
Also: what exactly do you imagine is the reason that officers carry firearms?
No, a video can't actually tell you what the source of a sound was with anything like that kind of precision.