Avon runs the organization with his second-in-command, Russell "Stringer" Bell, but isolates himself and String from the drug trade and eschews overt displays of wealth.Every member of the Barksdale Organization is disciplined to strict rules designed to thwart police investigations, most notably a prohibition on cell phones.The main supply of narcotics is separated from the rest of the organization and held in a house in Pimlico, where it can be cut and divided into smaller "stashes" for distribution in Barksdale territory.When Avon's errant nephew D'Angelo murders a drug dealer, he has Stringer pay a witness to change her story in court.D'Angelo is acquitted, but Avon demotes him to "The Pit" to replace Ronnie Mo, who had recently been promoted to his own tower in the Franklin Terrace project.The robbery and police activity combined raise suspicion that there is a leak in the Pit, and the increasingly paranoid Avon orders D'Angelo to remove the payphones near the projects, which had indeed been wiretapped.Avon's front man Orlando Blocker persists in trying to sell cocaine independently and ultimately gets arrested by an undercover state cop.Stringer tells Avon that Proposition Joe has offered to supply high-quality heroin from the Greeks in exchange for doing business in Barksdale territory.When Stringer orders two Barksdale "hitters" to ambush Omar as he accompanies his grandmother to church, Avon is angered by the breach of a long-standing truce on Sunday mornings.Avon privately concedes to Slim Charles that he has come around to Stringer's point of view and is tired of "beefing over a couple fuckin' corners".Based on evidence that Stringer provided to Colvin, the Major Crimes Unit raids Avon's safe house and are able to put weapons and conspiracy charges on all those present.By the end of the series, Marlo's second-in-command Chris Partlow makes peace with the Barksdales as well, as he is seen fraternizing with Wee-Bey in a prison courtyard.