David Gunn (doctor) by another anti-abortion activist, John Burt. From March 1993 through May 2009, Gunn was first of a total of four doctors murdered by killers proclaiming pro-life motivation. The others were doctors Barnett Slepian, John Britton and George Tiller. Gunn's murder helped lead to the passage of the Freedom of Access to Clinic Entrances Act. Gunn's death also prompted Paul Jennings Hill to issue the Defensive Action Statement, signed by 30 anti-abortion leaders, which justifies the killing of abortionists to protect fetuses. In 1994, Gunn's violent death inspired the first official single "Get Your Gunn" by rock band Marilyn Manson. The
George Tiller activist for five years and had written letters of support to the convicted murderer Michael Griffin, who had murdered Dr. David Gunn. She called him "a hero". At her trial in state court, Shannon testified that there was nothing wrong with trying to kill Tiller. The jury convicted Shannon of attempted murder, and she was sentenced to 11 years in prison. The following year, however, Shannon was sentenced to an additional 20 years in prison on charges of arson, interference with commerce by force and interstate travel in aid of racketeering in connection to her participation in several fires and