You are so fucking stupid. Let's all just say a little prayer and be thankful that none of us will ever have to take counsel from our resident rotund redhead from Greensboro.
The elements are not even close to being there.
https://codes.findlaw.com/ny/penal-law/pen-sect-125-25.html
That is NYs '2nd degree murder' statute. There are no prongs of that statute that fit these facts. None.
You would either have to pigeonhole it into "Under circumstances evincing a depraved indifference to human life, he recklessly engages in conduct which creates a grave risk of death to another person, and thereby causes the death of another person," but that doesn't work because punching someone 1 time in no way exhibits "depraved indifference to human life".
Otherwise, you would have to find a felony to charge him with, and then try to get to felony murder. But there is no underlying felony here either. Just nonsense.
IF it is true, as has been reported, that there was a local resident that confronted Sazbozo after he was causing a ruckus at 1AM, and then Bozo punched that 3rd party, and then coach came to defense of said third party by punching him back, then there is no crime. You have the right to come to the defense of another and use equal force, which is what sounds like what happened. If that is the case, he may not should even be charged with the misdemeanor assault 3, or leaving the scene of a crime, unless maybe he is bound to stick around to report the original crime, which was Bozo's assault on the neighbor.
If he hit the guy justifiably coming to the defense of another, I'm not sure what duty, if any, he owed to Sazbozo.
This should be pretty easy to sort out, since you have at least the neighbor and the kid as witnesses.
All that being said, leaving a dying guy on the street who is bleeding out, and then not mentioning that (or lying) to your bosses in a public facing job, is not a good look. So I think he should probably be let go. Just a sad turn of luck all around.
The lesson, as always, dont listen to DR.