Of course, but if that violated due process, anyone who's arrested and incarcerated prior to conviction had their rights violated, regardless of what the charge is.
I have a feeling the court decided the case on the narrow issue of whether the policeman had the legal right to arrest her. Obviously if an arrest was legal it doesn't grant the cop the right to do anything he feels like. But I don't know what the details of the case were. Perhaps she resisted arrest. Perfectly understandable. I might have done the same. The whole thing sounds outrageous, but unconstitutional? I don't know.