Dr. George Tiller was serving as an usher at the Reformation Lutheran Church in Wichita, Kansas when Scott Roeder walked up to him and shot him in the head.
The media at the time quickly adopted the lone nut or "lone wolf" theory of the murder. Having studied a number of similar anti-abortion crimes over the years, I said that while the murder may or may not have been a criminal conspiracy, there were very likely at the very least what I call "concentric circles of support". Even when such crimes are carried out alone, they tend to be well-planned and often draw on networks of social, ideological and even logistical support, sometimes unwitting. The murder of Dr. Tiller is best understood, after all, as an assassination -- arguably one of the most high-profile political murders in recent years. Such support can be hard to prove, especially by the standards of criminal law. But that does not mean it does not exist.