You find yourself in the unfortunate circumstance of having committed a crime and you've been arrested. While you're at the police station, your mother shows up and tells the investigators that she doesn't want them to speak to you, and that you are invoking your right to remain silent. She hasn't spoken to you, and you don't even know that she's there - she's trying to do what she thinks is right, and she's invoking your rights for you. The police thank her for coming, tell her when you will be released, and she leaves. You are never told that she has invoked your right to remain silent.

The investigator comes to you and explains the case against you, he asks you if you'd like to get your side of the story out, and you agree. You read your Miranda rights, and you agree to speak with him - waiving your right to remain silent and to an attorney. The police complete the interview with you, have a judge set your bail, and you bail out within a few hours.

Is the interview still valid even though your mother invoked your rights for you?

What if your mother had hired a lawyer for you, who called the police and invoked your rights for you? Should that change the outcome?

If not, can you think of any circumstances in which someone outside of the interrogation room can invoke the rights of someone inside the interrogation room?