RE: someone shoots a deer, than you shoot it, now what?
If one of the hunters is a youth, he/she gets it.
If not, first lethal shot (though some states say whoever "possesses" it)
If there's a fight, the other guy gets it (I am not arguing over a hunk of meat with an armed man (him)who is proven to be unstable enough to be arguing over a hunk of meat with an armed man (me))