What is the current state of the law around the Fifth Amendment privilege against self-incrimination?

The Fifth Amendment of the United States Constitution provides for a constitutional privilege against self-incrimination. Law enforcement must warn suspects before a custodial interview of their right to remain silent and to counsel, and that anything they say may be used against them. "After such warnings have been given, and such opportunity afforded him, the individual may knowingly and intelligently waive these rights and agree to answer questions or make a statement. But unless and until such warnings and waiver are demonstrated by the prosecution at trial, no evidence obtained as a result of this interrogation can be used against him." (Miranda, supra, 384 U.S. at pp. 478-479; quoted in People v. Whitson (1998) 17 Cal.4th 229, 244.)