"While our cases have recognized a difference between the Fifth Amendment and Sixth Amendment rights to counsel, and the policies behind these constitutional guarantees, an accused who is admonished with the warnings prescribed by this Court in Miranda has been sufficiently apprised of his Sixth Amendment rights and of the consequences of abandoning those rights, so that his waiver on this basis will be considered a knowing and intelligent one." (Patterson v. Illinois)
Combining Jackson with Patterson, the court gave us a rule that if the suspect's Sixth Amendment right to counsel had attached and been asserted, there could be no valid waiver, and no admissible statement on that case, unless the suspect himself initiated discussions or his attorney was present.
However, if the right had only attached but had not been asserted, a Miranda waiver would also constitute a Massiah waiver, and police could take an admissible statement. This complex rule often proved difficult for law enforcement officers, lawyers, and judges to grasp and apply. Thankfully, it has now been simplified somewhat.
Montejo v. Louisiana
Police arrested Jesse Montejo for his role in a robbery and murder. He was taken before a magistrate for arraignment on the charges, and the magistrate announced that counsel would be appointed for him. Before Montejo had an opportunity to consult with his appointed attorney, detectives approached him, gave a Miranda warning, and took a waiver.