It is interesting that although Bernard is nervous as he enters for his hearing, he, thanks to what he discovered during his trip, has something up his sleeve. For all the charges of inappropriate behaviour that the DHC can lay at his door, Bernard knows that he can trump it by pointing out the way that the DHC himself has infringed several regulations and laws. Fortunately for him, he has the proof that he can show to back his story up in the form of Linda and John, the DHC's naturally born son. Thus it is that Bernard responds to the charges against him "in a very loud voice." He is confident in his ability to create a public embarrassment for the DHC and thus this gives him strength and determination in facing what overtly seems to be an almost hopeless situation. Note the impact of the arrival of John on the DHC and the assembled crowd:
My father! The laughter, which had shown signs of dying away, broke out again more loudly than ever. He put his hands over his ears and rushed out of the room.
Bernard has succeeded in shaming the very person who was trying to shame him by bringing out a skeleton in his closet and placing it on display for all to see.