The nation's largest prison companies are making a big profit off illegal immigrants.
A new study shows one in six illegal immigrants is re-arrested within three years of release, and American taxpayers are paying for it.
It will cost taxpayers more than $2 billion this year to lock up and detain 400,000 illegal immigrants.
An Associated Press review shows that as private firms make more money, they are spending it more on lobbying lawmakers and contributing more to campaigns. During the last decade, they've spent $45 million.
At the same time, those private prisons' share of detention beds has jumped from 10 percent to nearly half.
Federal officials told the Associated Press privatization is not necessarily cheaper.