Perhaps they did, which was why they were asking outside lawyers
They probably asked external lawyers because the internal lawyers would say "we wouldn't do anything, but we are not experts in adoption law - we recommend you contact XYZ for a more final opinion."
Diva's Husband
The NYT was wrong in prying into the Whitewater affair which uncovered absolutely no wrongdoing by either President Clinton or his wife, Hillary Clinton, and no coverup or other criminal activity by any member of President Clinton's administration. The Republicans succeeded only in splattering mud on themselves and costing the taxpayers some $75 million.
Perhaps the NYT has learned from their Whitewater error in the case of Roberts' children. We can be happy they are doing the right thing now. I'm not similarly optimistic about the Republican Party.