My title: "Northern Illinois University Attack Shows that Smoking Kills."

Well, this certainly clears things up:

Authorities: Northern Illinois University Gunman Had Drugs in His System
Saturday, March 15, 2008

The gunman who opened fire on a Northern Illinois University classroom on Valentine's Day had traces of nicotine, cold medicine and an anti-anxiety drug in his system, authorities say.

The article later mentions that one should ignore this article:

"This combination of drugs in his system could have no effect whatsoever on his mental status," Angelos Halaris told the Sun-Times, chairman of the Department of Psychiatry and Behavioral Neurosciences at Loyola University Medical Center. . . .