Prolonged periods of being locked up alone can cause heart disease and mental health problems, experts say. Backers say the practice keeps guards safe.
They barged into homes in the middle of the night, then held people down while they beat and choked them, witnesses said. For years, signs of the violence went ignored.
She sought accountability in the military killing of the leftist folk singer Victor Jara in the right-wing turmoil that carried Gen. Augusto Pinochet to power in Chile in 1973.
A psychologist working for the C.I.A. had threatened while interrogating Khalid Shaikh Mohammed to kill one of his preteen sons. But they were never in U.S. custody.