Francis A. Boyle, an international law expert who worked under the first Bush Administration as a bioweapons advisor in the 1980s, has said that he is convinced the October 2001 anthrax attacks that killed five people were perpetrated and covered up by criminal elements of the U.S. government. The motive: to foment a police state by killing off and intimidating opposition to post-9/11 legislation such as the USA PATRIOT Act and the later Military Commissions Act.