Foucault films

Hello again,

Two postings in as many days...Apologies to anyone who is already tired of 
my questions!

At the moment, I'm looking for some information about the film version of 
the dossier 'I, Pierre Riviere, having slaughtered my mother, sister, and my 
brother...' published by Foucault and friends in 1975. To my knowledge, 
there exist two film versions: René Allio's 'Moi, Pierre Rivière, ayant 
égorgé ma mère, ma soeur et mon frère...' and Christine Lipinska's 'Je suis 
Pierre Rivière'. I came across a reference to one of the films in Alan 
Sheridan's book on Foucault ('The Will to Truth', p.134) that suggested that 
Foucault himself played a part in the movie - as a judge! So basically, I 
wanted to ask if anyone had seen either movie and could confirm in which 
version Foucault appears. This story seems almost too good to be true.

Thanks a lot - I'm grateful for any help on this matter.

Cheers,
Nick