From IMDB:

Witse returns to his hometown to find his niece’s murderer. It doesn’t take long before Witse gets in trouble with local police authorities. While conducting his investigation, old family issues are starting to surface.

From MHz Choice you can stream this 1.5 hour police procedural from Belgium. In Dutch with English subtitles.

For 9 seasons Belgium TV offered the program Witse featuring the detective Witse. That series ran from 2004 till 2012.

Before starting this film, be aware that it is the story of Witse trying to catch the sadistic psychotic serial killer that kidnaps young women and tortures them to death.  During the film you will see the killer’s very horrifying film clips of his tortures.  You might want to avoid this well-done but sadly stomach-churning film.  Had I known, I would not have started, but once hooked I had to see the conclusion.