My mistake..I did a search.
From what I could gather the perp got a single slash coming from above diagonally which opened up his torso, and his hand got in the way, almost severed.
The kid knew the rudiments of a proper strike.
The perp. likely died in a couple of minutes.
A good sword can come in handy if one knows how to use it, but give me a .45 Colt Commander any day.