It's a tale as old as time. Manager prepares to leave company to work for a competitor. Manager connects an external USB Device to his work computer and copies confidential files. Manager gives confidential data to his new employer.
Boston Beer's lawsuit accuses Soudant of "maliciously and willfully misappropriat[ing] Boston Beer's trade secret information by disclosure for a direct competitor."
If an employee is going to steal, an employee is going to steal. You can't prevent a bad apple from doing bad things. But you can take a few steps to best position yourself to protect your assets in the event you have a bad apple in your midst.