Vice: “The newly obtained document shows in granular detail the sort of data that the country’s carriers keep, and for how long. Much of the information reiterates what we already knew about law enforcement access to telecommunications data—how officials can request location data from a telecom with a warrant or use court orders to obtain other information on a phone user, for example. But the document does provide insights on what exactly each carrier collects, a more recent run-down of how long each telecom retains certain types of data for, and images of the tool the FBI makes available to law enforcement agencies across the country to analyze cell phone tower data. Ryan Shapiro, executive director of nonprofit organization Property of the People, shared the document with Motherboard after obtaining it through a public record act request. Property of the People focuses on obtaining and publishing government records.

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The document, a 139 page slide presentation dated 2019, is written by the FBI’s Cellular Analysis Survey Team (CAST)…”