Trump's DHS appointees have dismantled civil rights protections, allowed agents to remain anonymous, and encouraged them to wear masks.
ProPublica, a nonprofit newsroom, investigates abuses of power and reports on the actions of Immigration and Customs Enforcement (ICE) officers.
Recordings of those calls captured the terror residents felt as they watched masked men ambush people and force them into unmarked cars.
Author's summary: Trump builds a violent federal police force.