They do not need to read you your Miranda rights to question you, no. They only read you your rights if you are being detained. But they are free to use anythin

They do not need to read you your Miranda rights to question you, no. They only read you your rights if you are being detained. But they are free to use anything you say before or after if for some reason you wind up in court. Here’s a corroborating source: https://www.lawinfo.com/resources/criminal-defense/when-must-the-police-read-me-my-miranda-right.html https://www.lawinfo.com/resources/criminal-defense/when-must... Movies are often really wrong about lots of things in the criminal justice system.