Hmm, a lot of that information did come out early on, with the exception of the sealed records, in the colorado media. But it was reported, and the ignored, but the media as it did not generate the sensationalism they were looking for. I lived about 3 blocks away from Columbine when it all went down, and, like everyone who lived there, knew of some of the families, but I didn't actually know any of the kids that went there. More of a 2nd or third party knowledge kind of thing.
Denver media did report a lot of those facts, but no one followed up on any of that. Suprising what made it out into the national media.
Moral of the story: National medias are big fat liars.
...but we all knew that right?