Va.Tech Gunman's Motives Still a Mystery

In this undated photo released by the Virginia State Police, Cho Seung-Hui is shown. Seung-Hui, 23, is identified by police as the gunman suspected in the massacre that left 33 people dead at Virginia Tech in Blacksburg, Va., Monday, April 16, 2007, the deadliest shooting in modern U.S. history.But nearly two weeks after the shootings, Cho is as much a question mark as ever, And investigators are losing sleep over the possibility that the whys and wherefores may never come. (AP Photo/Virginia State Police) (AP)

The closest anyone has come to suggesting a motive for targeting that hall is Andy Koch, who shared a suite with Cho last year. Koch says the first woman to complain about Cho to campus police lived there, and that he would often find Cho staring out a window toward the building.

Cho killed most of his victims _ 30 of the total _ in Norris Hall. He had a class there this semester, but not that day.

Between the shootings at West AJ and Norris, Cho took the time to return to his dorm, retrieve a package, go to a post office and mail it off to NBC News. The package contained 43 photos, a written statement and a video tirade.

Some have called it Cho's multimedia "manifesto." But if a manifesto is a public declaration, Cho's package may be the biggest misdirect of all.

"Your Mercedes wasn't enough, you brats," Cho growls. "Your golden necklaces weren't enough, you snobs. Your trust funds wasn't enough."

Suitemate Karan Grewal wonders how, at a school where more than 60 percent of the students get financial aid, Cho could have built up such resentment against rich kids.

"We all have the same kinds of rooms," he says. "We all get university-issued desks and chairs, beds and mattresses. So I don't know where he got that idea from."

Cho's South Korean immigrant parents could not provide him with a Mercedes. But they'd managed to send his sister to Princeton, and him to Tech.

In his screed, Cho railed against those whom he felt discounted him as "weak" and "pathetic."

"You have vandalized my heart, raped my soul and torched my conscience."

Cho was picked on in junior high for his accent and speech. But when he got to Virginia Tech, he had a clean slate.

Koch and his other suitemates invited Cho to parties, where he showed himself adept at drinking games like "beer-pong." They got him to sign up for the lottery to receive tickets to sporting events.