Mord Uden Grænser (The Team) 2015
Not a film but a TV series. Danish/German/Belgian Police collaborate on a case where women employed as sex trafficked prostitutes are murdered in Germany, Belgian and Denmark with the same modus operandi in each crime scene. All connected to a murder committed several years previous.
Spent nearly 20 quid on the DVD for this. Only 8 episodes. It's not great and I probably wouldn't watch it again. But might watch it if a 2nd series was made.