Probably, since this occurred in Rudy’s police state of NYC, they would be arrested since handguns are (for all practical purposes) outlawed in NYC, and long arms need to be stored locked and unloaded.
In NYC, you are supposed to call 911, then wait. That way the police know where to deliver the body bags and where to collect the evidence.
With a murder/violent crime rate that is a fraction of the rate in gun-slinging, Red State Utopias like Jacksonville, Charlotte, Mobile, DFW, Houston, Phoenix, Denver, Tulsa, Orlando, Memphis, Atlanta, and Birmingham, the vast, overwhelming majority of law abiding people in New York City don't need to worry about body bags.
How do you arrest a corpse?
You don't. You just break out the steel-mesh-reinforced body bags for the subjects that're three times their live weight in lead and send 'em to the morgue.