Bukti di pengadilan memperlihatkan Libby dan beberapa pejabat lain Gedung Putih serta Departemen Luar Negeri membocorkan identitas Plame untuk mendiskreditkan suaminya, mantan duta besar besar Joseph Wilson --yang telah menuduh pemerintah memelintir intelijen guna membuat kasus untuk menyerbu Irak.
Evidence at that trial showed Libby and several other White House and State Department officials leaked her identity to discredit her husband, former Ambassador Joseph Wilson, who had accused the administration of twisting intelligence to build a case for invading Iraq.