Each justice may write reasons in any case if he or she chooses to do so.
While each justice wrote an opinion, it was Taney's ruling that stood as the majority decision.
In a court opinion, another justice wrote that forensic science has "serious deficiencies".
And court officials say a retired justice may vote and even write opinions in cases that he or she heard.
"Enough is enough," the justice wrote in a decision made public yesterday.
When someone does appeal, the law requires that justices write a summary of the case.
Innocence and justice have written their names on his brow.
"The devil would be in the details," the justices wrote.
The justice wrote: "the rule of law must prevail over intelligence objectives."