Step by Step or Un honnête commerçant is a 2002 Belgium comedy - thriller film directed by Philippe Blasband.
Plot
The police question Hubert Verkamen, suspected of having killed an entire family. Despite presenting himself as an honest merchant, the cops know perfectly well that he is nothing but a dangerous drug dealer. Having never succeeded in catching him, they rejoice at finally having the opportunity to arrest him and try every means to make him talk, to wear him down. But nothing works; the manipulation is not where it was expected.