James Eagan Holmes (24) — prime accused in the killing of 12 people in the “Batman shooting” in Aurora, Colorado, last Friday — was said to have mailed a notebook outlining his plans to unleash violence to a psychiatrist at the University of Colorado, days ahead of the attack.

Prior to its discovery on Monday, the package containing Holmes’ detailed notes was lying in the mailroom of the university for up to a week, law enforcement officials told Fox News media channel.

According to the report — citing a source close to the investigation — images in Holmes’ notebook included “drawings of stick figures shooting at other stick figures”.

Commenting on the images the news channel said, “Inside the package was a notebook full of details about how he was going to kill people. There were drawings of what he was going to do in it — drawings and illustrations of the massacre.”

Reports of the notebooks discovery came even as the first memorial service for a victim of the shooting was held on Wednesday. Meanwhile, Holmes made his first court appearance on Tuesday, sporting a comic-book-style shocking-orange hairdo.

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