Earlier today, the AP reported on a massive domestic intelligence gathering operation run by the NYPD. I spoke with the Brennan Center's Faiza Patel, author of the center's report on domestic surveillance, about the implications of local law enforcement engaging in intelligence gathering for counterterrorism purposes and the differences between the FBI and NYPD's legal authorities and accountability mechanisms. The following transcript has been edited slightly for clarity.
What did the NYPD do that technically the FBI doesn’t think it’s allowed to do?