It's hard to say exactly how many because ICE isn't keeping records precisely to make it easier to hide their captives. There are more than a few reports of midnight flights around the country with lawyers being unable to contact their clients.
But for just a taste, here's a propublica article on the matter.
But for just a taste, here's a propublica article on the matter.
https://www.propublica.org/article/immigration-dhs-american-...