The Toilets Were Closed from the Inside
Les vécés étaient fermés de l'intérieur (original)
A bus conductor gets dressed for work in the morning, goes to the toilet, where he is killed by a bomb. The Commissioner and his fat, bumbling assistant, Inspector Charbonnier are put on the case. After interviewing friends, wives, colleagues, and spying on strangers who might be connected, our heroes trace the assassin down to a mental institution where, it seems, the murder victim has been an inmate for the last three years...
Starring Coluche, Jean Rochefort, Roland Dubillard, Danièle Evenou, Robert Berri, Jean Luisi, Billy Bourbon, Olga Valéry, Robert Dalban, Virginie Vignon
It's a comedy and crime movie, and has a rating of 5.3 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Belgium.