U.S. Attorney Ron Machen, with MPD help, cleans up Shaw (DOJ photo)

They’re among 15 D.C. and Maryland residents facing federal charges in connection with the bust of an alleged drug ring in Shaw.

”At the time of the arrests, law enforcement officers seized illegal narcotics, six firearms, four vehicles, and more than $600,000 in cash,” reads a news release from U.S. Attorney Ronald C. Machen Jr., who said the Tuesday arrests are the “result of a concerted, relentless campaign to disrupt and dismantle the networks that fuel drug addiction in our city.”

The arrests follow a three-year investigation by a joint local-federal task force in a neighborhood that’s gentrifying but has seen paroxysms of gang violence in recent years.

“Because of our continued focus in the Shaw community, we have seen a dramatic reduction in violent crime,” Police Chief Cathy L. Lanier said in the release.

WUSA-TV reports that the ring’s operations were centered on 7th and O streets NW, near the tidy Kennedy Rec Center and what will soon be the sparkling CityMarket at O development. One defendant, however, stands accused of slinging crack within 1,000 feet of Spingarn High School in Ward 5, opening himself up to enhanced penalties.

The indictment: