Okay so let's start with the beginning. This well-dressed man comes to the woman asking for a ride. He specifically states he is going to the exact same high school. This creates slight confusion among the reader. After she drives off and the suitcase is in the back, this creates tension. Finally, we see the contents of his luggage, a knife, and some tape.
The reader can obviously tell that this man was going to kill and kidnap this woman! This was his entire motive.
