Crossfire (2008)

A grizzled Parisian detective is sent to an outpost town in Southern France to dismantle a gang of killers which has freed a notorious criminal. The detective inherits a team of unmotivated and dishevelled detectives, and he makes connections nobody else ever saw because nobody else bothered to look. A mysterious, charismatic figure, he leads by example, and gradually his team begins to feel like cops again.