The thing about the Ramsey spin machine is that the Ramsey's were being tried in the media. Their lawyers had to do in public what should have been done in a court room if the evidence had been there to bring the Ramseys to court. It wasn't, so instead pressure was applied through the media. All these things were being spun into a specific scenario and they had no way to address it. How were they to respond?
Not sure I'm following you. If they were truly innocent then there would be no forensics or physical evidence that a GJ would buy, so no worries. If there is a lot of evidence, the only way to avert a trial is to taint the jury pool via the media so the DA knows he has no chance. That's the way I see it, anyway.
Now, it could be that they were just REALLY unlucky and a lot of forensics and physical evidence mounted that just didn't jive with reality. THERE I could see the need for a spin machine.