Lawyer who represented the ‘DC Madam’ releases names of 174 groups - including the FBI, IRS and State Department - that 'used escort service between 2000 and 2006', but he still can't reveal the individual clients 

• Montgomery Blair Sibley listed entities that he says used Deborah Jeane Palfrey's services 
• Among those named were Lockheed Martin and PriceWaterhouseCoopers
• He said he obtained the information from a subpoena of phone numbers
• They are believed to be contained in Palfrey's black book of clients
• She left the book in Sibley's possession before she killed herself in 2008
• Despite naming the companies, Sibley still cannot name individuals