Whitewater figure James B. McDougal, who died Sunday at the Federal Medical Center in Fort Worth, was in solitary confinement when he collapsed of an apparent heart attack in a jail cell, a federal prison official said. McDougal, 57, had been placed in "administrative detention" because he had refused to give a urine sample as part of random drug testing for inmates, said Todd Craig, chief spokesman for the U.S. Bureau of Prisons.