This isn't a political question, but how easy is it to get an automatic weapon in Blacksburg, Virginia?

Authorities were investigating whether the gunman who killed 32 people on the Virginia Tech campus in the deadliest shooting rampage in U.S. history was a Chinese man who arrived in the United States last year on a student visa.

The 24-year-old man arrived in San Francisco on United Airlines on Aug. 7 on a visa issued in Shanghai, the source said. Investigators have not linked him to any terrorist groups, the source said.

Police believe three bomb threats on the campus last week may have been attempts by the man to test the campus’ security response, the source said.

The exits to the buildings where the shootings occurred were chained by the shooter, the source said.

The suspected gunman in the Virginia Tech shooting rampage, Cho Seung-Hui, was a troubled 23-year-old senior from South Korea who investigators believe left an invective-filled note in his dorm room, sources say.

The note included a rambling list of grievances, according to sources. They said Cho also died with the words "Ismail Ax" in red ink on one of his arms.

Cho had shown recent signs of violent, aberrant behavior, according to an investigative source, including setting a fire in a dorm room and allegedly stalking some women.

A note believed to have been written by Cho was found in his dorm room that railed against "rich kids," "debauchery" and "deceitful charlatans" on campus.

Cho was an English major whose creative writing was so disturbing that he was referred to the school's counseling service, the Associated Press reported.

Professor Carolyn Rude, chairwoman of the university's English department, said she did not personally know the gunman. But she said she spoke with Lucinda Roy, the department's director of creative writing, who had Cho in one of her classes and described him as "troubled."

It was 5:30 Monday morning and Karan Grewal was finishing a break after a long night of cramming for his classes at Virginia Tech. As he left the bathroom at Harper Hall, his dormitory mate, Cho Sueng-Hui, wearing boxer shorts and a T-shirt, entered for his morning ritual of applying lotion, inserting his contact lenses and taking his medication.

"He was, like, normal," Grewal, a 21-year-old accounting major, said today, describing the ordinary start to what turned out to be an extraordinary day.
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According to school officials, Cho even had time to post a deadly warning on a school online forum.

"im going to kill people at vtech today," they said he wrote.

Professors and classmates were alarmed by [Cho Seung-Hui's] class writings — pages filled with twisted, violence-drenched writing.

"It was not bad poetry. It was intimidating," poet Nikki Giovanni, one of his professors, told CNN Wednesday.

"I know we're talking about a youngster, but troubled youngsters get drunk and jump off buildings," she said. "There was something mean about this boy. It was the meanness — I've taught troubled youngsters and crazy people — it was the meanness that bothered me. It was a really mean streak."

Giovanni said her students were so unnerved by Cho's behavior, including taking pictures of them with his cell phone, that some stopped coming to class and she had security check on her room. She eventually had him taken out of her class, saying she would quit if he wasn't removed.

Lucinda Roy, a co-director of creative writing at Virginia Tech, said she tutored Cho after that.

"He was so distant and so lonely," she told ABC's "Good Morning America" Wednesday. "It was almost like talking to a hole, as though he wasn't there most of the time. He wore sunglasses and his hat very low so it was hard to see his face."

Roy also described using a code word with her assistant to call police if she ever felt threatened by Cho, but she said she never used it.