RICHMOND, Va. (AP) — The Virginia State Police investigator seemed puzzled about what the inmate was describing: “unbearable” conditions at a prison so cold that toilet water would freeze over and inmates were repeatedly treated for hypothermia.

“How do you get hypothermia in a prison?” the investigator asked. “You shouldn’t.”

The exchange, captured on video obtained by The Associated Press, took place during an investigation into the death of Charles Givens, a developmentally disabled inmate at the Marion Correctional Treatment Center, who records show was among those repeatedly hospitalized for hypothermia.

After a special grand jury considered the case but opted not to bring criminal charges, Givens’ sister sued in federal court, alleging her brother was subjected to routine mistreatment, including “cold-water torture,” before he was fatally beaten in 2022.