Police Explore Gunman's Mysterious Mailing

A gunman's final tirade is the focus of video and other materials mailed by the Virginia Tech shooter to NBC headquarters in New York.

Video: NBC Video - The Manifesto

NBC said the package contained a rambling and often-incoherent, 1,800 -word video manifesto on CD, plus 43 photos, 11 showing him aiming handguns at the camera.

Cho Seung-Hui said in one excerpt aired on NBC Nightly News, "You had a hundred billion chances and ways to have avoided today. But you decided to spill my blood. You forced me into a corner and gave me only one option. The decision was yours. Now you have blood on your hands that will never wash off."

He also said, "Your Mercedes wasn't enough, you brats. Your golden necklaces weren't enough, you snobs. Your trust funds wasn't enough. Your vodka and cognac wasn't enough. All your debaucheries weren't enough. Those weren't enough to fulfill your hedonistic needs. You had everything."

NBC said the package was received in Wednesday morning's mail. It was apparently sent between the first and second shootings Monday that left 32 people dead.

NBC Nightly News played small portions of a videotape the network said was part of the mailing on Wednesday night.

"When the time came, I had to do it," Cho is seen saying.

Virginia State Police Superintendent Steve Flaherty said the information was immediately turned over to the police.

"This may be a very new, critical component of the investigation," he said.

Earlier Wednesday, professors and college suitemates of the gunman blamed in the deadliest shooting in modern U.S. history painted a dark portrait of Cho.

Cho's dormitory suitemates said he rarely spoke to them or made eye contact. They and his professors describe him as a troubled, very quiet young man.

One of the suitemates, Karan Grewal, said no one told him that his teachers were concerned about Cho's being dangerous or suicidal.

Grewal said Cho was always alone -- in the dining hall, watching TV or working out in the gym.

Grewal said he pulled an all-nighter to do homework the night before the shootings and saw Cho up around 5 a.m., a few hours earlier than normal. He said that Cho was his usually silent self.

Still, Grewal said he had no idea Cho was capable of killing 32 people plus himself.

Police said Wednesday that Cho was accused of stalking two female students in the fall of 2005. Virginia Tech Police Chief Wendell Flinchum said that Cho had been taken to a mental health facility that year.

Authorities Seek Medical Info

Campus police have applied for search warrants for all the medical records pertaining to Cho.

Documents filed Wednesday show police searched Cho's dorm room Tuesday. They recovered, among other items, two computers, books, notebooks, and a digital camera, along with a chain and combination lock.

The front doors of Norris Hall had been chained shut from the inside during the shooting rampage Monday.

The application for the warrant seeks records from the Schiffert Health Center on campus and New River Community Services in Blacksburg, Va.

In filing the documents, investigators said it is "reasonable to believe that the medical records may provide evidence of motive, intent and designs."

Scare Unfounded

Students still on edge after the deadliest shooting in U.S. history got another scare Wednesday.

Police in SWAT gear with weapons drawn swarmed Burruss Hall, which houses the president's office, because of unspecified suspicious activity.

A Virginia State Police spokeswoman said the threat was unfounded but students were shaken.

Flinchum said that a threat had been called in to a school operator against school President Charles Steger.

"Police presence was increased and that led to false rumors," Flinchum said. "It led to false report of a threat of a suspicious person in the hall."

Flinchum said that reports like that are not uncommon, which is why he said the school's police department will maintain a more visible presence.

One student said, "They were just screaming, 'Get off the sidewalks."' She said police seemed "very confused" about what was going on.

One officer was seen escorting a crying young woman out, telling her, "It's OK. It's OK."