In the detention room Adam, Christa and Matt talk about the murder of Matt. They speculate about possible offendors and their motives for murdering Matt. They, however, do not know that Mr Roe listens to them. Mr Roe just pretends that he listens to music through the headphones, but he hears every word that Adam, Christa and Matt say.
It is also the place where Christa reads Matt's love letter.