(Reuters) - A secretive U.S. Drug Enforcement Administration unit is funneling information from intelligence intercepts, wiretaps, informants and a massive database of telephone records to authorities across the nation to help them launch criminal investigations of Americans.
Although these cases rarely involve national security issues, documents reviewed by Reuters show that law enforcement agents have been directed to conceal how such investigations truly begin - not only from defense lawyers but also sometimes from prosecutors and judges.
http://www.reuters.com/article/2013/08/ ... AI20130805
Gathering of evidence
NSA: Much of what the agency does remains classified, but Snowden's recent disclosures show that NSA not only eavesdrops on foreign communications but has also created a database of virtually every phone call made inside the United States.
SOD: The SOD forwards tips gleaned from NSA intercepts, wiretaps by foreign governments, court-approved domestic wiretaps and a database called DICE to federal agents and local law enforcement officers. The DICE database is different from the NSA phone-records database. DICE consists of about 1 billion records, and is primarily a compilation of phone log data that is legally gathered by the DEA through subpoenas or search warrants.