On May 17, 2011 TCP gathered a distinguished panel of experts to discuss U.S. detention policy for terrorism suspects at a videotaped event. The use of the material witness statute for preventive detention is the subject of a Supreme Court challenge this term in Ashcroft v. al-Kidd. Mr. al-Kidd’s counsel, Lee Gelernt, discussed the case while panelists Hon. James Robertson, Suzanne E. Spaulding, Steve Vladeck, and Kenneth Wainstein provided a range of perspectives on U.S. policies and practices related to the detention of terrorism suspects.