What law did Mueller allegedly break?
The law sets up the transition team as a private corporation. It also requires the GSA to provide office space, equipment, and email. It requires the GSA to keep the email system secure. The emails do not belong to the GSA. They belong to the members of the transition team, and are not government work product.
So for openers, the GSA staff violated the law that created the transition team. Someone can, and probably will, put some big time hurt on whoever released the information.
Mueller violated the 4th Amendment, by asking for and receiving private communications without a warrant.
He also violated the law that says that if he discovers that he is in possession of private or privileged communication, he must stop reviewing the material, notify the owner, and return it. Instead, he has used that material as the basis for questions he is asking people in the course of his investigation. This is doubly troubling because some of the material is protected by attorney-client privilege. Add to that the fact that some of the contents have been leaked to the press, and you have a really serious legal situation.
I'm no attorney, but it appears to me that any potential prosecutions that result from his investigation are hopelessly compromised. They rely evidence that is now "the poison fruit of a poison tree."
