When the DA has already convicted you in the press,
and the press is going along with the lynch mob,
then the defendant MUST come out swinging in his
because the media isn’t going to report accurately
or do that job on its own.
And, pardon my cynicism, but there are times when you can’t just wait for the legal system to “work”.
The Scottsboro boys did that, and got convicted, and absent a courageous judge (a rare breed) would have been hanged for a crime which never happened. They needed all the help they could get—in the form of outside publicity and protests.
And the Duke lacrosse team would have almost certainly been convicted by a biased and/or intimidated jury (17% of potential jurors, when poled, said they would vote to convict them even if they were innocent).
If the system isn’t going to stop a Nifong or a Corey,
then the usual rules have to be tossed.