James Holmes, the accused gunman in last Friday's midnight movie massacre in Colorado, mailed a notebook "full of details about how he was going to kill people" to a University of Colorado psychiatrist before the attack, and the parcel may have sat unopened in a mailroom for up to a week before its discovery Monday, a law enforcement source told FoxNews.com.
"Inside the package was a notebook full of details about how he was going to kill people," the source told FoxNews.com. "There were drawings of what he was going to do in it -- drawings and illustrations of the massacre."
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