I'm in a similar predicament concerning a story I was asked to write for a research book and some less than reputable things I did in the past. If the case had gone to trial and you were proven innocent, you would have been completely exonerated of the accusations. Because of double jeopardy, you could not be charged again for the same crime. Since it did not go to trial and there is no statue of limitations, however, you could still be indicted for the charges if new evidence arises. So if you were to discuss the details of the crime in public, you could say something that would be considered evidence that is admissible in the court of law and indicted for the crime.