How does the author use foreshadowing in The Kite Runner?

The novel begins with foreshadowing. Amir says the event that he will unfold will set the narrative for the rest of the book. This, of course, would be the rape of Hassan.

I became what I am today at the age of twelve, on a frigid overcast day in the winter of 1975. I remember the precise moment, crouching behind a crumbling mud wall, peeking into the alley near the frozen creek.