I had a case once where the beneficiaries of a large estate were at war with one another. The housekeeper of the decedent, a person who had faithfully worked for the decedent for many years and who served the decedent well during a long illness before the decedent died, turned out to be an "illegal." While she was here, she had married someone, had a family, house, car, paid taxes - the American dream, except for the Citizenship or Green Card.
One of the beneficiaries perceived - wrongly - that the housekeeper was on the side of the other beneficiary in their bitter, bitter fight. So he called the immigration authorities. They picked up the housekeeper, and took her to "Krome," the name around here of the federal detention center where "illegals" were warehoused. I don't know whatever happened to her, but the whole thing made me sick.