With the exception of psychotic prisoners being treated through the healthcare department, every violent incident I have ever come across in prison could be traced back to shame and the feeling of being disrespected. Conventional programmes working outside the heat of the moment studiously avoid the crucial shame trigger. I worked with it every day. I came up with the name Shame/Violence Intervention (SVI) to describe my approach.
His approach is difficult, slow, expensive (in terms of trained therapists' time) and successful. Unfortunately, it's not easily scalable and demonstrates why breaking the cycle of violence is such a nettlesome problem.
[Update - 3/9/14: Jonathan Asser's screenplay, Starred Up, was nominated for eight British Independent Film awards.]