The first new details on the case in awhile, and perhaps a sign that the official report is finally about to come out. It does sound like Lanza did quite a number on his hard drive:
Lanza had removed the hard drives from his computers, then opened the metal containers to get at the discs which store data. He scratched a W through the discs, before trying to smash them with a barbell.
…but even still, there’s probably some data that survived.