Surely as more and more comes out of this investigation it will place more pressure on the club and it will start affecting them on field.
You can be stoic and unyielding upto a point the Dons I feel are at this stage, eventually the weight of evidence against you will change the public perception and affect your ability to perform.
Then when your mere ability to perform your job on a weekly basis being dependant on the decision of others then that will hinder you further and after a point where you were stoic to start with you feel that there is nothing more you can do and it is all pointless then it will all go downhill. Ie Storm in 2010.