Original title (FR): Le Dossier Maldoror (The Maldoror File)

When two girls go missing, Paul Chartier (Anthony Bajon), an impulsive young police recruit, is assigned to “Maldoror”. This secret unit has been set up to monitor a dangerous sex offender. When the operation fails, fed up with the limits of the legal system, Chartier embarks on a solitary hunt to bring down the culprits.

https://www.themoviedb.org/movie/959596-le-dossier-maldoror