Other mistake: Amazing how quickly the killer, armed only with a butcher's knife, could behead a guy under water before killing the other one.
Other mistake: Amazing that nobody sees the hooker's dangling body before that boat tour which looks like it's around nine, plenty of time for somebody else to notice her.
Other mistake: The hooker's killed on dry land, bloodied before being dragged into the water yet she somehow has dried blood on her face when discovered.
Other mistake: When translating Dutch for English, one translation uses "their" when it should've been "there." It's in the scene when we first see the lead cop talking to his daughter.
