For my story, I think I may have come across a possible plot hole, but it may not be depending on how the law works. I read that double jeopardy means that a defendant cannot be charged for the same crime twice, following an acquittal or conviction, according to this article. https://en.wikipedia.org/wiki/Double_jeopardy However, if the judge in the case decides to drop the charges before it's time for a jury to make it's verdict, would it still be possible to try the defendant for the same crime, since it never got to a verdict yet? According to the research I did, it turns out there has to be a verdict before the law applies. This creates a plot hole, because the villain plans on contaminating the case when he is in court. However, if the law does not apply in this case, then there is no reason for him to wait till it goes to court. He can contaminate the case at anytime prior. But for my story to work, I need him to contaminate at the trial, which means he needs a reason to wait to the trial. Is their any legal benefit to waiting till the trial, if that makes sense?