Some of the pictures in the video package show him smiling; others show him frowning and snarling. Some depict him brandishing two weapons at a time, one in each hand. He wears a khaki-colored military-style vest, fingerless gloves, a black T-shirt, a backpack and a backward, black baseball cap. Another photo shows him swinging a hammer two-fisted. Another shows an angry-looking Cho holding a gun to his temple.

He refers to "martyrs like Eric and Dylan" — a reference to the teenage killers in the Columbine High massacre.

NBC News said the package arrived in New York late Tuesday night and was delivered to the network's headquarters about 11 a.m. Wednesday. It was sent by overnight delivery and apparently 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.

NBC News President Steve Capus said that the network notified the FBI around noon but held off reporting on it at the FBI's request, so that the bureau could look at it first. NBC finally broke the story just before police announced the development at 4:30 p.m.

It was clear Cho videotaped himself, Capus said, because he could be seen leaning in to shut off the camera.

State Police spokeswoman Corinne Geller cautioned that, while the package was mailed between the two shootings, police have not inspected the footage and have yet to establish exactly when the images were made.

Cho repeatedly suggests he was picked on or otherwise hurt.

"You have vandalized my heart, raped my soul and torched my conscience," he says, apparently reading from his manifesto. "You thought it was one pathetic boy's life you were extinguishing. Thanks to you, I die like Jesus Christ, to inspire generations of the weak and the defenseless people."

A law enforcement official said Cho's letter also refers in the same sentence to President Bush and John Mark Karr, who falsely confessed last year to having killed child beauty queen JonBenet Ramsey. The official spoke on condition of anonymity because the person was not authorized to speak to the media.

Earlier Wednesday, authorities disclosed that in November and December 2005, two women complained to campus police that they had received calls and computer messages from Cho. But the women considered the messages "annoying," not threatening, and neither pressed charges, Virginia Tech Police Chief Wendell Flinchum said.

Neither woman was among the victims in the massacre, police said.

After the second complaint about Cho's behavior, the university obtained a temporary detention order and took Cho away because an acquaintance reported he might be suicidal, authorities said. Police did not identify the acquaintance.