How about putting Narvin face to face with these students? I know many that would love to be able to look him in the face and tell him he is the one that is lying. Especially a certain boy that was in OP for months at a time. Narvin stated "Our systems such as Observational Placement (not Observational Punishment) are designed for control, not punishment. Students are only required to be placed in there for one hour, if they remain in control of themselves".
If you look at the big picture, who has more to gain from lying? The young adults that have no threat of going back to these facilities and are only trying to save others from their experiences, or the one that wants to reopen his school and make more money?