Psychologist David Shern is the president and CEO of Mental Health America, an advocacy group formerly known as the National Mental Health Association.

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Following revelations that professors at Virginia Tech had recognized gunman Seung-Hui Cho as troubled long before his rampage Monday, officials and experts consider the role of universities in handling such cases.

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Seung-Hui Cho, the student at Virginia Tech University who killed 32 people Monday, mailed a package to NBC News between his two shootings. The NewsHour reports on these developments, including earlier stalking accusations against the gunman.

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In the wake of shootings that left 33 members of their community dead, Virginia Tech students went to Web sites such as Facebook and MySpace to memorialize friends and make sense of the carnage.

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Several of the victims in Monday's mass shooting of 32 Virginia Tech faculty and students came from other countries. The NewsHour reports on the local and international reaction to the tragedy.

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A day after mass shootings left 33 people dead at Virginia Tech University in Blacksburg, Va., the students and faculty were working on dealing with the aftermath, even as more information about the shooter was becoming available.

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Police officials released the name of the Virginia Tech shooter, 23-year old student Cho Seung-Hui, who shot and killed 32 students Monday before killing himself in the worst mass shooting in American history.

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