Thanks for proving my point. They could not legally release the birth certificate so they found more documentation in the archives.
All that had been released up to the point at which Abercrombie said he wanted to release more, was the certificate of live birth. Abercrombie wanted to release more than that because, appearing as it did, first on DailyKos without attribution, all it did was raise more questions. But beyond the certificate of live birth, all Abercrombie’s “investigation,” turned up was ‘something actually written down in the archives.’