The illegal arrest of Willem Engel, charged with planning to speak out

Two police vans with masked officers - who refused to identify
themselves (what is against the law) - put him in handcuffs - also
against the law – and carried him off.
They charge him that he would have spoken out again on social media. In reality a news channel has published an interview with him last week.
Apparently it looks like he is now being banned from speaking.