Mass murderers are almost always addicts. Cho was only the latest.
An Addict's Rage--Mass Murderer Cho
Until recently I often said, "Not every mass murderer in U.S. history has been an alcohol or other-drug addict. For example, Oklahoma City bomber Timothy McVeigh may not have been one. On the other hand, I wouldn't be shocked. By far the vast majority, no doubt, have been addicts."
I was wrong. An astute reader passed along a link with brief biographies of the three main perpetrators of the bombing, which disavowed me of the notion that McVeigh was the exception to the rule. Most interesting is that the biography of McVeigh includes no mention of drug use--more evidence that biographers lack an understanding of the importance of addiction in explaining the behavior of their subjects. Instead, ...