During 2001 and 2002, Vann Nath worked intensively with Cambodian film director Rithy Panh in the preparation of a documentary film entitled "". Vann Nath was interviewed in the film, in which Panh brought together former prisoners and guards of the former Tuol Sleng prison. Vann Nath confronted and questioned his former torturers in the documentary film. To recognize their work, both Vann Nath and Rithy Panh have been conferred the title of "Dr honoris causa" by the University of Paris VIII on 24 May 2011.