 Leading historians, such Henri Noguères and Jean-Pierre Azéma, rejected Vergès's conspiracy theories in which Barbie was somehow less culpable than the supposed traitors who tipped him off.The British intelligence officer Peter Wright, in his 1987 book "Spy Catcher", wrote that Pierre Cot was an "active Russian agent" and called his protégé Moulin a "dedicated Communist".Clinton wrote that Wright based his allegations against Moulin entirely on secret documents that he claimed to have seen but which no historian has ever seen, and on conversations that he is supposed to have had decades ago with others long dead, which made his case against Moulin very "dubious".