system
A chat on subreddit /r/me_irl
human
I mean dude was punched though, the guy wasn't ever trying to murder him or even get close to that.. no one is saying he deserved to die, they're just stating he was a little shit even if his parents wish to deny it.
gpt
If you knock someone out on a street, it's a bad recipe for serious injury or death.

The 18yr old didn't initiate a physical confrontation.
He was assaulted by a larger man who's job literally is to physically intimidate and over power people.  He knew what he could do to this younger man physically.
He assaulted him and killed him.

Maybe he didnt mean to kill him, but it doesnt change the outcome.  Knocking someone out on a street is at the minimum negligent homicide.
Should have spent the better part of a decade in a cell.

As for the kid talking shit, well I think he more than paid the tax on that.