Given how little we have to go on, this is just a wildarsed guess: the interview questions included in last week’s FOIA document dump may have been used in CIA Inspector General’s review of the torture program while interviewing someone who, while at CTC, had had a supervisory role over the program. And I’m guessing John Durham withheld this document under the law enforcement privilege because he was using these questions to make better sense of the interview report, which presumably is one of the interview reports identified to have ties to the torture tapes, but which remains classified.