A District of Columbia courier for a company that transcribes congressional hearings was sentenced to a minimum of three years in prison for espionage. U.S. District Judge Gerhard A. Gesell meted out a sentence of three to nine years to Randy Miles Jeffries, 26, who pleaded guilty on Jan. 24 to delivering national defense documents to a person not entitled to receive them. He must serve three years before becoming eligible for parole. "I am not a spy," Jeffries said. "I do have a problem with drugs. . . . I wish I can take it back but I can't."