This is pretty bad, apparently they didn't even let him contact his lawyer: "The actions of the police are also being criticized because Mai was apparently not allowed to contact his lawyer during the house search". That's just straight up illegal.
Did they give any reasons? Was he posing a threat? Or are they denying it now?
They said that the person being searched is not allowed to make phone calls, which is correct except when they want to contact their lawyer. They just omitted that part apparently...