Comment by Juliate
How does the police _justify_ the arrest then, to the ones being arrested, their family, and to their counsel?
How do those know what happens next, and where?
You know, basic questions, even more critical in a democracy.
You cannot force a citizen without a legal reason to do so. If you don't have a warrant (or a legitimate reason at the time of arrest), you're legally naked.
Nothing about what you said matters. The police are legally allowed to arrest a person without presenting an arrest warrant, if the arrest warrant exists. Then after they are brought to jail, they will present to warrant to the person arrested or their counsel. The family is owed no information from the police. That's not how it works.