Two men involved in bringing a 12-year-old Baltimore boy to Washington for illegal sexual activity were sentenced in U.S. District Court yesterday to serve 20 months to five years in prison.

Timothy M. McNamara, 23, of Arlington and Philip H. Garrett, 25, of Adelphi were arrested last March after an FBI undercover investigation. Assistant U.S. Attorney Theodore A. Shmanda said the case was the first prosecution in the District of Columbia under U.S. law that prohibits interstate transportation of minors for sexual purposes.

"I cant't think of much more that would be lower than that," said Judge John Garrett Penn during a sentencing hearing yesterday.

FBI Special Agent M. Glenn Tuttle, posing as a Florida businessman, met Garrett outside a cafe on New York Avenue NW last February and told Garrett he was interested in a "young boy," according to court records.

Garrett later arranged for Tuttle to contact McNamara, whom, he said, "handles that age group," court records said.

In March, McNamara, under FBI surveillance, went to Baltimore, picked up the 12-year-old boy, and delivered him to Tuttle's hotel room in Washington, according to court records.

In separate nonjury trials before Penn, McNamara was convicted of transportation of a minor in interstate commerce for illegal conduct for commercial exploitation, and Garrett of abetting that crime.