The many people anxiously waiting for the final word on Miranda would have to wait a while longer. The decision in a U.S. Supreme Court case is not announced until the opinions are written.
The majority opinion is the one that counts most. It both announces the Court's decision and explains the reasoning behind it. These opinions tend to be tens of thousands of words long. Creating one takes weeks and sometimes months of research, discussion, writing, revising, arguing, and re-revising before all the majority justices can agree on the exact wording throughout.
The majority opinion is a cooperative effort but it does have a single author. The Chief Justice selects the author, provided the Chief Justice has voted with the majority. If not, then the senior justice on the majority side, the one with the most years on the Court, does the choosing.
Chief Justice Earl Warren chose himself to write the Miranda opinion. It was no surprise that he, along with the other activist justices—Brennan, Black, and Douglasvoted with the majority. Nor was it a surprise that the four justices known for being strict constructionists—Harlan, Clark, White, and Stewart—made up the minority.
The only justice whose vote was at all uncertain was