Homeland Security Secretary Kristi Noem has visited the high-security El Salvador prison where Venezuelans who the Trump administration alleges are members of the Venezuelan Tren de Aragua gang have been held since their removal from the U.

First-hand accounts, along with court documents and flight tracking data, reveal the administration’s calculated race to send alleged gang members to El Salvador before a court could halt their plans.

Earlier this month, President Donald Trump used the Alien Enemies Act to deport 238 Venezuelans from the United States—sending them not to their home country, but to a prison in El Salvador notorious for its harsh conditions.