Three District residents, who prosecutors said were members of a violent gang centered at Fifth and O streets NW, were convicted yesterday in federal court in Alexandria of conspiring to rob a $4 million shipment from a Brinks armored car.

Kevin Tyrone Baldwin and Kendall Taylor were convicted of conspiracy, robbery and illegal use of a firearm in the May 30 robbery of a Brinks truck at a loading dock of Dulles International Airport.

Albert Larry Weaver was found guilty of conspiracy, but the jury failed to reach a decision on two other counts against Weaver and on all three charges against a fourth defendant, Rudolph Hilton Williams.

Law enforcement officials have connected the men with a group known as the "5 N O Crew," which investigators said specialized in robbing drug dealers and may have been involved in more than 15 recent killings.

During jury deliberations in the four-day trial, the jurors requested that their addresses not be made available to the defendants because one juror felt intimidated, according to sources.

U.S. District Judge James C. Cacheris, who warned spectators to maintain decorum while the verdicts were read, ordered that the addresses be sealed from public view. U.S. Marshal Roger Ray said he increased security at the courthouse because of the number of defendants, the crowd of spectators and the nature of the crimes.

Baldwin, 21, Weaver, 20, and Taylor, 19, face up to 20 years in prison. Cacheris set sentencing for Nov. 3. No date was set for the retrial of charges against Williams and Weaver.

Assistant U.S. Attorney W. Neil Hammerstrom Jr. conceded in his closing arguments that evidence and phone tips suggested that several more people were involved in the early morning robbery of the Brinks truck. He maintained, however, that fingerprints and witness identifications constituted an "open and shut" case against some of the defendants.

One of three Brinks guards assigned to the shipment was thrown into the truck, had a gun was pressed to his face and his life threatened, Hammerstrom said, recounting testimony. "His eyes were locked on Albert Weaver's face. And do you remember what he said Weaver told him? 'I'm going to kill you,' " Hammerstrom said.

Testimony also showed that Taylor left a partial print from his left palm on the Brinks truck, and a second guard identified Williams from an FBI photo spread.

Baldwin lost his shoes trying to escape through mud at the border of the Dulles property after the group's getaway van got stuck in a ditch on a dead-end road a few miles from the robbery site, according to evidence.

Defense attorneys argued that the evidence pointed to an inside job by one of the Brinks guards. Gary Kohlman, Williams' attorney, said it was suspicious that one of the guards testified that he had been followed to work by an orange truck, but never reported it to his superiors.

Mark Rochon defended Weaver, saying it was irrational to have the smallest of the four men brandish the gun and attack the guards. "You, the little guy, knock {the guard} out and get his gun," Rochon said, mimicking an imaginary conspirator.