"Sitting in one of the hard plastic chairs in the office was a surreal experience (this is telling. I'd like to hear the deails of how it’s a surreal experience, show us what makes it surreal, give us a little peek inside Olivia's head. It doesn't have to be long, just enough for us to bond with Olivia a little - assuming she's our main character) for Olivia. On either side of her were other students involved in the incident in one way or another. On one side was somebody who had witnessed it firsthand. On the other side was the brother of the victim. (This is good. Your mention of 'the incident' makes us curious about what happened and begs the question, how is Olivia involved?)
Olivia did not want to think of Chase as a victim. She did not want to think about the situation at all, but as she sat there waiting for her parents, listening to the ongoing click-clack of a keyboard behind the receptionist’s desk, the thoughts pushed their way through, invading Olivia’s mind and filling it with unpleasantness. (This is a weak word. I'd love to know what makes it unpleasant. You don't have to launch into a huge discription, but a few words might help. Like, are there any bad smells associated with the unpleasantness? any images? Just a thought.)
The girl to her right had her arms and her legs crossed, her right foot shaking to some muted beat that only she could
Every now and then, Olivia felt his gaze shift,
Olivia sat motionless in the center, her hands kept to herself, folded in her lap. If she could have coiled herself into a ball, she would've
Overall, this is an intriguing first page. I am very curious about 'the incident' and Olivia. I think the only thing needed is a little more connection to her so that the reader will identify with her. But remember, this is just my opinion. Dianne may have something entirely different to say (she often does!). I hope this has been helpful - to everyone.