The government pays AT&T to place its employees in drug-fighting units around the country. Those employees sit alongside Drug Enforcement Administration agents and local detectives and supply them with the phone data from as far back as 1987.
Drug Agents Use Vast Phone Trove, Eclipsing N.S.A.’s (Published 2013)
The scale and longevity of a data storage program run by the government in partnership with AT&T was unmatched by other government programs, including the National Security Agency’s gathering of phone call logs.