When the police tries to arrest Dax on the bridge, Dax is holding Anita to him threatening to cut her throat. After he gives in, Anita falls to the floor. After the police arrests Dax and leaves the scene, Anita apparently is still lying there, but nobody seems to care.
When Dax is in the interrogation room Witse enters and says he wants to go home. Dax refers to Witse's sister. Apparently, Witse had told Dax during his arrest about his sister. This is very unprofessional. Police inspectors normally don't tell suspects about their private life.