Police have "Black Ops Sites" where they take prisoners to be tortured.
Here is an article from 2015 reporting on the existence of such sites with thousands of detainees, american citizens:
https://theintercept.com/2015/02/26/exclusive-chicago-black-site-detainee-speaks/
Here is a video from 2023 of a cop threatening to take someone to a black ops site in Florida if they dont behave:
@freemo
I'm sure that's true. Because of the Patriot Act.