Hopefully, along with finding the 'many' nannies that attended to young Jack for their testimony, it may be just as helpful as the pictures...
Somehow, stupid, idiotic, completely self-absorbed Nick holds the key to a quick ending to this whole saga. Whatever hesitation he has about taking these pictures of Jack without his knowing, he needs to get over it. Right now, Nick is his own worst enemy, and yes...he needs professional help ASAP.
What truly surprises me is that it is fairly obvious Jack has never had a 'real' physical, and I am sure the school would have demanded as such...have the parents coerced medical malpractice in young Jack's life?
Lastly, and let us not forget, Jack's testimony, if it should go so far, could be devastating..