In "The Sniper" what is the character sketch of the sniper that gets killed?

We aren't actually told very much at all about the other
sniper that the sniper who is the focus of this excellent short story has to face and
kill. We know that he is positioned on a rooftop opposite to the sniper who is the main
protagonist of the story, and that when the sniper reveals himself by shooting at the
informant and the soldiers, the other sniper then shoots him. The first time we actually
see him comes when the sniper has managed to trick his opponent into believing he is
dead, and thus his enemy stands on the rooftop opposite, "with his head clearly
silhouetted against the western sky." He is then of course shot and tumbles off the
roof, and the sniper goes over to see the face of the man that he has killed, only to
make a crushing discovery:

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Then the sniper turned over the dead body and
looked into his brother's
face.

The identity of this
other sniper then was the central character's brother, which of course highlights the
theme of the story, which is the way that civil war can divide communities and even
families themselves, with tragic results.