Trump's DHS appointees have dismantled civil rights protections, allowing agents to remain anonymous and wear masks, while also threatening groups that oppose them.
ProPublica, a nonprofit newsroom, investigates abuses of power and has obtained recordings of emergency calls from residents in Santa Ana, California, who were terrorized by masked men in unmarked cars.
Recordings of those calls captured some of the terror residents felt as they watched masked men ambush people and force them into unmarked cars.
Author's summary: Trump's administration builds a violent federal police force.