"The Communist Manifesto" and Hitler's "Mein Kampf" were among the favorite reading materials of Jared Lee Loughner, the suspected gunman in today's fatal shooting that reportedly left six dead and gravely injured a U.S. congresswoman.

Lougher, 22, listed those tomes among his favorites on his YouTube channel, in which he wrote that "conscience dreams" were a "great study" at his college, Pima Community College.

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One user on Twitter, Caitie Parker, wrote she went to high school, college and was in a band with the gunman. She said she hadn't seen him since 2007.

Parker wrote of Lougher, "As I knew him he was left wing, quite liberal and oddly obsessed with the 2012 prophecy."

She also described him as "more left."

Read more: Assassin's politics lean 'left wing, quite liberal'