SENTENCED TO LIFE. Abimael Guzman, 57, professor turned potentate of the bloody Shining Path guerrillas; for treason; in Lima, Peru, where desperate social conditions, combined with his own legendary charisma, enabled Guzman to become one of the world's most horrifically violent practitioners of his trade. His conviction followed a trial in which his judges concealed their identities behind hoods, to avoid retribution from die-hard Guzman supporters.