Ms. Feinstein’s speech detailed the lengths to which the C.I.A. had gone to hinder the committee’s investigation, which it began in 2009 after senators learned the agency had destroyed videotapes of the interrogations under President George W. Bush. Under President Obama, prosecutors exonerated the officials who ordered those tapes destroyed.
Ms. Feinstein said that when Senate staff members reviewed thousands of documents describing those interrogations in 2009, they found that the C.I.A.’s leadership seriously misled the committee when it described the interrogations program to the panel in 2006, “only hours before President Bush disclosed the program to the public.”
The interrogations included a variety of brutal methods, some of which — waterboarding in particular — were unequivocally torture.