What is the current state of the law in the context of Miranda warnings?

Once a suspect receives Miranda warnings, he "is free to exercise his own volition in deciding whether or not to make a statement to the authorities." (Oregon v. Elstad (1985) 470 U.S. 298, 308 [84 L.Ed.2d 222, 232].) If he requests the assistance of counsel at any time during the interview, "`the interrogation must cease until an attorney is present.'" (Edwards v. Arizona (1981) 451 U.S. 477, 485 [68 L.Ed.2d 378, 386] (Edwards), quoting Miranda, supra, 384 U.S. at p. 474.)