By GILLIAN FLACCUS A jury Thursday convicted a 57-year-old man of the torture-murder of his adult daughter, whose body was kept in a freezer for two years.The Orange County Superior Court jury found Clarence Butterfield guilty of first-degree murder and assault with a deadly weapon, and also found true special circumstances of murder with mayhem and murder with torture.He faces a term of life in prison without the possibility of parole when he is sentenced on Oct.