Gunman: "Now You Have Blood On Your Hands"

Cho Seung-Hui screen grab NBC video
The search of the Virginia Tech gunman's dorm room and backpack produced eight pages of notes that law enforcement sources characterize as a "suicide note," reports CBS News correspondent Bob Orr. Cho Seung-Hui also sent photographs, videos and writings to NBC in New York before he died in the massacre that left 33 people dead, authorities said.

"You had a hundred billion chances and ways to have avoided today," 23-year-old Cho Seung-Hui said in an harsh, emphatic voice, in a video excerpt shown on NBC Nightly News. "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."

Orr reports the writings found in Cho's dorm "appear to be a manifesto" and are "a rambling diatribe against people of privilege," says one law enforcement official. As the official put it, "He (Cho) just seemed to hate everybody." The notes, he continued, "are page after page of single-spaced rantings."

This contradicts Tuesday's statement by the Virginia State Police that no suicide note was found.

The notes are hard to read and to follow, say officials. "Every other word is 'f---'," one official said. Cho raises no race issues, but focuses mostly on class and privilege, railing against "rich people who have Mercedes, gold, and trust funds."

The notes end with the phrase, "We'll soon be together." Police sources don't know who the "we" is referring to or if it's a specific reference.

The materials sent to NBC appear to have been mailed in the two-hour window between the first burst of gunfire in a high-rise dormitory and the second fusillade, at a classroom building, according to the time stamp on the package, NBC reports.

Click here for an interactive gallery of the victims.

NBC said it turned the package over to authorities on Wednesday.

"This may be a very new, critical component of this investigation. We're in the process right now of attempting to analyze and evaluate its worth," said Col. Steve Flaherty, superintendent of Virginia State Police.

The package included 29 photos, 11 of them showing Cho aiming handguns at the camera, NBC reports. Some of the pictures showed him smiling. Some showed him brandishing two weapons at a time, one in each hand. Another showed him swinging a hammer two-fisted.

It also included an 1800-word manifesto with sentiments similar to the dorm room notes. The document "rants against rich people and warns that he wants to get even," according to a law enforcement official who spoke to The Associated Press on condition of anonymity because he was not authorized to speak about the case. Much of Cho's rant is incoherent and laced with profanity, and he rails against hedonism and Christianity, NBC reports.

The package was sent by overnight delivery but did not arrive at NBC until Wednesday's mail. It had apparently been delayed because it had the wrong ZIP code, NBC said.

An alert postal employee brought the package to NBC's attention after noticing the Blacksburg return address and a name similar to the words reportedly found scrawled in red ink on Cho's arm after the bloodbath, "Ismail Ax," NBC said.

"I didn't have to do it. I could have left. I could have fled," Cho says in the video. "But now I am no longer running. If not for me, for my children and my brothers and sisters that you (expletive). I did it for them."

Cho also makes references to the Columbine High massacre and the teenage killers, according to NBC.

NBC said it immediately turned the package over to authorities on Wednesday.

If the package was indeed mailed between the first attack and the second, that would help explain where Cho was and what he did during that two-hour window.

Earlier Wednesday, it was reported that two women students had complained in 2005 to campus police about Cho.

Sources would not say if Cho's dorm room notes contained any names. Previously, it had been reported that Cho mentioned one or two women students in his notes.

According to Virginia Tech Police Chief Wendell Flinchum, in November of 2005, he made contact with a female student through telephone calls and in person. The student called it "annoying" but declined to press charges.

In December 2005, Cho, an English major, sent instant messages to a second woman. He made no threats, Flinchum said, but the student complained. Officers spoke to him at that time.

Neither of the two women who complained about Cho in 2005 was among Monday's victims.

An acquaintance of Cho later contacted authorities concerned he might be suicidal, reports CBS News correspondent Sharyn Alfonsi. It was at that point he was taken voluntarily to a mental health facility, Carilion Saint Albans Behavioral Health Center in Christiansburg, Va. But a day later, a medical evaluation found Cho's "insight and judgment" normal and he was approved for outpatient treatment.

Because Cho went to the facility voluntarily, the incident did not show up on Cho's background check, allowing Cho to buy the two guns he needed to carry out the killings.