Five Jackson residents indicted last August on charges of conspiracy to distribute crack cocaine have pleaded guilty in Detroit federal court.
Thirty-three-year-old Deondre Mullen is described as the leader of the "Evonnie Boyz & Gyrlz" gang.
He and 22-year-old Dwight Fullilove face prison sentences ranging from 22-27 years.
Mullen admitted selling crack to undercover agents on three occasions in 2008, while 52 rocks of crack cocaine and three small bags of heroin were found in Fullilove's home.
Three other defendants ranging in age from 21 to 24 pleaded guilty earlier. Each faces a mandatory minimum of 10 years' imprisonment at sentencing.
Berg says three additional defendants were named last week in a complaint accusing them of distributing crack to the Evonnie gang and others.