How does the author create suspense in the tale of "The Sniper"?

The author creates suspense several different ways in the telling of "The Sniper."  First off, the setting of the story most definitely creates suspense for the reader.  The narrator, a sniper during the civil war in Ireland, is on a rooftop, completely isolated from anyone else.  The time of day, twilight into evening, also adds to the suspense. 

 Next, the reader's limited information gathered through the narrator creates and adds to suspense.  We only see what he sees, and we feel completely wrapped up in his predicament. 

The mood of the story also creates suspense.  Images and sounds detailed throughout the story foster an environment in which we know something bad is going to happen by the end of the story.

 Finally, the basic plot of the story creates suspense for the reader.  Because we are only privy to the narrator's thoughts, we aren't aware of anything else that might be going on with the other sniper he's shooting at (and who is shooting at the narrator!).  When the narrator feels the intense desire to see the man he's killed, the reader knows there's a reason why, however unconscious.  The moment where the narrator looks into the face of his brother is the culmination of suspense throughout the entire story.