When you're ready to resume interrogation after hearing any statements the suspect volunteers, "the next inquiry is whether a valid waiver of the right to counsel and the right to silence has occurred." (Oregon v. Bradshaw) In the Bradshaw case, this requirement was met by the fact that warnings had been repeated before the polygraph exam and the suspect had given a voluntary waiver. So if an invoking suspect reinitiates discussions, then after you've listened to any explanations, stories, or statements he volunteers, and before resuming your interrogation, give the warnings again and take a waiver of his previously asserted rights. Statements you take under this sequence should be admissible, as in the following cases:
U.S. v. Duggan (Fifth Circuit—Texas). After waiving and talking for 20 minutes, a firearms arrestee asked if he could speak to an attorney. Questioning stopped, and the officer gave the suspect a phone. Instead of calling his lawyer, the suspect volunteered that he knew the guns were in his home but said that they were not stolen. The officer re-Mirandized, took a waiver, and obtained a videotaped confession. The court held this confession admissible, per Bradshaw.
U.S. v. Huerta (Seventh Circuit—Indiana). A narcotics arrestee invoked counsel. Detectives did not speak to her again until they asked her for her shoes. She asked why they wanted her shoes, and their explanation led to her saying that she wanted to talk further without an attorney. "Before the second interrogation began, Ms. Huerta was advised of her rights and then signed the waiver form, thus fulfilling the waiver requirement." Statements admissible.
U.S. v. Michaud (Ninth Circuit—Nevada). After telling interrogators she wanted an attorney, a kidnap suspect was placed into a holding cell. Later, her cellmate told a deputy that Michaud "needed to talk to somebody." Officers met Michaud and her cellmate and asked Michaud if she needed to get something off her chest. She said she had some information about a girl who had been killed. New Miranda warnings were read, and Michaud signed a waiver form and submitted to interrogation. The court held that the officers properly followed the Bradshaw sequence and Michaud's statements were admissible.
U.S. v. Gonzalez (Eleventh Circuit—Florida). Following the suspect's invocation of counsel, his wife was interviewed. She told a narcotics officer that her husband wanted to talk to him "immediately," so the officer went to the jail, gave Gonzalez another Miranda warning, and took both a waiver and a 13-page confession. The court held that Gonzalez had reinitiated the questioning, "albeit through his agent, his wife." Since the officer took a waiver of the rights Gonzalez had previously asserted, his confession was properly admitted against him.