DICE is a

DEA The Drug Enforcement Administration (DEA; ) is a United States federal law enforcement agency under the U.S. Department of Justice tasked with combating drug trafficking and distribution within the U.S. It is the lead agency for domestic en ...

database that consists largely of

phone log A phone log is metadata collected from telephone or mobile phones for the purpose of surveillance or espionage. This metadata may include: length of calls, phone numbers of both parties, phone-specific identification information, Global Positioning ...

and Internet data gathered legally by the DEA through

subpoenas A subpoena (; also subpœna, supenna or subpena) or witness summons is a writ issued by a government agency, most often a court, to compel testimony by a witness or production of evidence under a penalty for failure. There are two common types of ...

, arrests, and

search warrants A search warrant is a court order that a magistrate or judge issues to authorize law enforcement officers to conduct a search of a person, location, or vehicle for evidence of a crime and to confiscate any evidence they find. In most countries, ...

nationwide. DICE includes about 1 billion records, and they are kept for about a year and then purged.Exclusive: IRS manual detailed DEA's use of hidden intel evidence
Reuters, John Shiffman and David Ingram, 8/8/2013

References

Drug Enforcement Administration {{Database-stub