bj81 -
First, you would have to trust in our system of justice, which would find you innocent if you are, indeed, innocent - and you would have to trust that those who believed you guilty before hearing any evidence against you would not be on your jury.
Second, there is no reason why you
cannot sue Nancy Grace - and you would probably find an attorney willing to take you on as a client, possibly on a contingency, if Nancy Grace can be shown to have spouted false facts or made defamatory comments.
I am sure you remember the O.J. Simpson trial - there has never been so much press given a suspect in a crime. O.J. was convicted in many a press article for the murders of his ex-wife and Ron Goldman. And yet, even with all of the negative press he received, and all of the "evidence" of his guilt presented to the public, he was still found innocent by a jury, purportedly based on the evidence they heard during the trial and not on what they read in the papers or heard on TV prior to the trial.
I am not sure that Nancy Grace has as much influence as you fear. I believe most jurors take their role seriously, and will not convict someone wrongly (although they may find someone
innocent wrongly
).