In the season finale, Greggs finds the strength to finger "Little Man" as one of the men who shot her. Daniels and McNulty go to the feds with crushing evidence about some Baltimore politicians tied to Barksdale, thinking they finally have him. However, the Feds only want the politiicans and not Barksdale. D'Angelo can't swing a deal, and cops to a possession charge and 20 years hard time after a talk with his mother.
In chronicling a multi-generational family business dealing illegal drugs and the efforts of the Baltimore police to curb their trade, this series draws parallels between these organizations and the men and women on either side of the battle.
The words of Gary W. Potter, Professor of Criminal Justice and Police Studies at Eastern Kentucky University, in writing about the savings and loan scandals of the 1980s, can also be used to illuminate some of the central premises of the show.