Something away from the scandal itself, non-American here and I don't get plea deals. I mean, normally, a trial can result in acquittal even if the defendant admits their guilt if there's very strong objective evidence(DNA records etc.) disproving it. There has existed previous cases where some new evidence surfaced years after a plea deal and the defendant, previously found guilty, was released. So, why does a plea…
American criminal trials are so costly in terms of money and time that the process itself is a form of punishment. Sure, you could go to trial and find yourself not guilty, but then the prosecution files an appeal and you have to keep paying a lawyer. If there's a reasonable chance of you being found guilty, the prosecutor will be happy to strike a reasonable deal with you, so you can get it over with and carry on wi…
In the US, the prosecution can't appeal a verdict in a criminal trial. In some cases, you could be tried for the same crime in a different jurisdiction though (likely with a different prosecution as well).