The story of Bruno Bréguet, one the most enigmatic figures of the shadowy battle between western security services and international violent extremists during the so-called "golden age of terrorism" in the 1970s and 1980s, has been given a new twist. A new book has revealed that in his later years Bréguet served not only the infamous Illich Ramírez Sánchez, better known as Carlos the Jackal, but the US government too. Bréguet's spying for the CIA earned him tens of thousands of dollars, and contributed to the capture of his erstwhile boss by French secret services in 1994. The news that the CIA was prepared to hire as an agent a man like Bréguet, who had been twice convicted by Israel and France for his terrorist activities and is believed to have bombed a pro-democracy radio station in Munich funded by the US government, underlines the moral and ethical questions facing intelligence services when it comes to recruiting such individuals. If anyone in the CIA balked at employing Bréguet as an agent, there is no record of their concerns. For the next four years, Bréguet appears to have supplied information to the CIA, possibly indirectly contributing key elements to the French intelligence operation that successfully grabbed Carlos from a clinic in Khartoum in 1994. Breguet's final mystery remains unresolved however. In 1995, the veteran extremist turned CIA agent disappeared definitively after boarding a ferry from a Greece to Italy. Was he murdered? Or did he commence a new life under a false identity?