Because the judge in the case caught the unusual language, which she believed was unconstitutional, and directly asked the prosecution on the record what they were doing. The prosecution immediately retreated from the secret deal at which point Hunter Biden's lawyers said they were ripping up the deal to help the prosecutors to not be publicly embarrassed. If not for that judge, no one would have known how they did it, only that Hunter Biden would have escaped with probation for a set of crimes that would land anyone else in prison for decades and gained almost total immunity for any crime that may have been committed in that period of time.
My opinion, and the judges, and much of the media biased left, right, and center.
But you are in good company wanting to see the evidence. This bit of corruption was so obvious that now oversight committees are preparing to send out subpoenas.
A letter signed by three committee chairmen called on Attorney General Merrick Garland to answer their questions about the derailed plea deal by Aug. 14.
www.nbcnews.com
It was immediately after the Hunter Biden plea deal fell apart that Trump's new charges along with Hunter Biden's former coworker being named as the judge to oversee Trump's prosecution happened. It is a game of DOJ corruption to misdirect from other DOJ corruption.