After immigrants are detained by ICE, there are probably records somewhere of who has an attorney, and who is calling family members or an attorney.
For the immigrants who aren’t calling any family or lawyers, the poorest of the poor, people with little to no connection to anyone, who may not even say which country they are from, if the administration were actually trying to kill as many disconnected immigrants as possible in secret, would society know?
For example, if the administration was composed of all types of conservative people, but 30 percent were secretly Nazis or wanted racial genocide, could there be a campaign to not just remove, but kill, immigrants, and the public doesn’t find out?
https://en.wikipedia.org/wiki/Vasily_Blokhin
Blokhin was selected for the position by Joseph Stalin in 1926 and led a company of executioners that performed and supervised numerous mass killings in the Soviet Union during Stalin’s reign, mostly during the Great Purge and Eastern Front of World War II.[1] Blokhin is recorded as having executed tens of thousands of prisoners by his own hand, including his killing of about 7,000 Polish prisoners of war during the Katyn massacre in spring 1940, making him the most prolific official executioner in recorded world history.[1][2][3] Blokhin was forced into retirement in 1953 after the death of Stalin and condemned during de-Stalinization shortly before his death in 1955.