How does the author use foreshadowing in The Laramie Project?

Doc O'Connor says that Wyoming is a great place to live. He does, however, add a sinister touch to this statement. "They say the Wyoming wind'll drive a man insane," he says. By including O'Connor's statement, Kaufman throws out yet another hint of the macabre acts that are later recorded..... the brutal and irrational beating of Shepard. O'Connor's comment thus becomes a type of foreshadowing of the murder or at least a warning that crazy things have previously occurred in Wyoming.