The film, by Marcel Schuepbach, is the first documentary ever shot inside the International Criminal Tribunal for the Former Yugoslavia.
Rights were sold in France's Pierre Grise Distribution, Italy's Ripley's Film and Croatia's HRT with discussions ongoing in Germany and the UK.
Wide also acquired two new films for which it will handle international sales.
Locarno closing night work L'Orchestra Di Piazzi Vittorio produced by Italy's Lucky Red and a new documentary from Mika Kaurismaki entitled Sonic Mirror, a look at world music with Billy Cobham.
In Venice, meanwhile, Wide will handle competition film C'est Gravida Qui Vous Appelle by Alain Robbe-Grillet.