Well isn't that a doosy!!!
I am no Lawyer, but someone possibly the Mother approached the court to have the file sealed.
There are reasons why this would be done, mostly to protect the child and/or mother from what ever.
Freedom of information does not override a supreme court ruling. But if a powerful enough case could be made a lawyer could petition the court to have the original ruling overturned.
The court would have to have a strong reason to alter its ruling and release the information, but it is 2012 and most of the original people involved may be deceased so there may not be a reason to keep the records sealed.
But be careful, some things we don't always NEED to know.

NEIL
