Earlier quoted context omitted.
How is that a key point? The agents were asked to wait in a public area, the hall outside the courtroom. There was a call with the chief judge who confirmed this is a public area. The allegations revolve around judge Dugan's actions. They allegedly cancelled the targets hearing and [directed] the them through a private back door to avoid arrest. Edit: directed, not escorted.
If we're going to be technical about this, which one has to be in the eyes of the law, what is the difference between escorting them through the private back door vs escorting them through the front door? How do you prove intent? That her intent was to obstruct? They point out in the article that such room (juror room) is never usually used by certain people, but that still doesn't prove anything about her intent.
If the only reason to use the backdoor is to avoid arrest, then that proves her intent. If there was another reason to use it then that will come up in court.