; and (ii) a summary of the support, documents, and witnesses provided by the Attorney General to the Working Group. (B) Material included A majority vote of the members of the Working Group shall determine the findings, conclusions, and recommendations included in the report submitted under subparagraph (A). (C) Documentation of numerical edits If for any reason the Working Group is unable to develop the estimates under paragraph (2), the Working Group shall in the report under this paragraph document the reasons such estimates could not be developed and make recommendations toward developing such estimates. (c) Members of the Working Group (1) In general (A) Attorney General discretion The Working Group shall be composed of representatives of Federal departments and agencies, law enforcement agencies, Tribal governmental agencies, nongovernmental organizations, and other subject matter experts as the Attorney General determines appropriate. (B) Specified members The Attorney General shall appoint representatives of the following agencies and nongovernmental organizations to the Working Group: (i) Three representatives from State or unit of local government who have received a grant from the Internet Crimes Against Children Task Force program with extensive, direct experience conducting both CyberTipline investigations and proactive, online undercover investigations, including the use of specialized tools for peer-to-peer investigations. (ii) The Chief or Deputy Chief of the Child Exploitation and Obscenity Section of the Criminal Division of the Department of Justice. (iii) The National Coordinator for Child Exploitation Prevention and Interdiction of the Department of Justice. (iv) A representative of the Behavioral Analysis Unit of the United States Marshals Service with subject matter expertise in child exploitation offenders who also commit contact offenses. (v) A special agent of Homeland Security Investigations with expertise in both CyberTipline investigations and proactive online investigations. (vi) A