Former head of the CIA's clandestine service Jose Rodriguez claims he can take the White House down over a torture cover-up scandal.
Rodriguez said he may testify before the House Intelligence Committee if he is granted immunity from prosecution, The Sunday Times reported.
Intelligence sources believe Rodriguez is now quite determined not to become the fall guy in the controversy over the destruction of CIA videotapes showing the torture of terrorist suspects.
The hundreds of hours of videotapes reportedly showed the interrogation of two al-Qaeda leaders, Abu Zubaydah and Abd al-Rahim al-Nashiri, while they were held in a secret military prison.