Washington Post said:
A day after we learned of a draining turf battle between the NSA and other law enforcement agencies over bulk surveillance data, it now appears that those same agencies are working together to cover up when that data gets shared.
The Drug Enforcement Administration has been the recipient of multiple tips from the NSA. DEA officials in a highly secret office called the Special Operations Division are assigned to handle these incoming tips, according to Reuters. Tips from the NSA are added to a DEA database that includes “intelligence intercepts, wiretaps, informants and a massive database of telephone records.” This is problematic because it appears to break down the barrier between foreign counter-terrorism investigations and ordinary domestic criminal investigations.
Because the SOD’s work is classified, DEA cases that began as NSA leads can’t be seen to have originated from a NSA source.