Trump's DHS appointees have dismantled civil rights protections, allowing agents to remain anonymous and wear masks, while also threatening groups that oppose them and overwhelming legal challenges to their tactics.
ProPublica, a nonprofit newsroom, investigates abuses of power and has obtained recordings of emergency calls from Santa Ana, California, where Immigration and Customs Enforcement officers stormed the area in June.
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 violent federal police force.