https://www.bbc.com/news/articles/cz04y0371lvo
However, a DHS statement said the data had been “misinterpreted".
“It also includes many who are under the jurisdiction or currently incarcerated by federal, state or local law enforcement partners,” the DHS said.
So, just because they are not being held by ICE, it does not mean they are all "roaming freely", as Trump claims.
“For example, Zacarias Moussaoui, who’s in a maximum security prison in Colorado for his role in the 9/11 attacks, is not currently detained by ICE so will likely be on that list,” says Aaron Reichlin-Melnick, an immigration enforcement expert at the American Immigration Council.