mailroom after the attack. trace gallagher live in our west coast newsroom with more of the chilling details. trace. reporter: and it s very important to remember how this thing went down, megyn, because the psychiatrist who thought that he got a package from james holmes on monday notified authorities. authorities went to the university thinking there was a suspicious package. well it turned out not to be from james holmes. but while they were in the university mailroom they thought, you know, this isn t a bad concept. so they brought in a team of investigators and they looked through the entire mailroom, all the packages, and only then did they find the package that was addressed to the psychiatrist from james holmes. they could not touch it without a warrant. so they went and they got a warrant. they removed the package, gave it to the f.b.i., and now we are learning what you talked about, megyn, inside these chilling details, drawings of what was going to happen, illustrations of