You can revoke your right to remain silent any time during questioning. You don’t waive it by talking. You only waive it if you’ve been given the warnings, and then agree to talk. Then anything you say can and will be used against you. But once you start talking, you say “I don’t wanna talk to you no more” the questioning is over.
Sorry; mean to say “invoke your right to remain silent.” Big difference with “revoke your right to remain silent.”
My mistake.