trade makes it an obvious choice of investigation for Cedric Daniels' permanently established Major Crimes Unit. Councilman Tommy Carcetti begins to prepare himself for a mayoral race. He manipulates a colleague into running against the mayor to split the black vote, secures a capable campaign manager and starts making headlines for himself. Approaching the end of his career, Major Howard "Bunny" Colvin of Baltimore's Western District wants to effect some real change in the troubled neighborhoods for which he has long been responsible. Without the knowledge of central command, Colvin sets up areas where police would monitor, but not punish, the drug trade. The police crack down severely on violence in these areas and also on drug trafficking elsewhere in the city. For many weeks, Colvin's experiment works and crime is reduced in his district. Colvin' superiors, the media and city politicians eventually find out about the arrangement and the "Hamsterdam" experiment ends. With top brass outraged, Colvin is forced to cease his actions, accept a demotion and retire from the Police Department on a lower-grade pension. Tommy Carcetti uses the scandal to make a grandstanding speech at a weekly Baltimore city council meeting. In another strand, Dennis "Cutty" Wise, once a drug dealer's enforcer, is released from a fourteen-year prison term with a street contact from Avon. Cutty initially wishes to go straight partly to reignite his relationship with a former girlfriend. He tries to work as a manual laborer, but struggles to adapt to life as a free man. He then flirts with his former life, going to work for Avon. Finding he no longer has the heart for murder, he quits the Barksdale crew. Later, he uses funding from Avon to purchase new equipment for his nascent boxing gym. The Major Crimes Unit learns that Stringer has been buying real estate and developing it to fulfill his dream of being a successful legitimate businessman. Believing that the bloody turf war with Marlo is poised to destroy everything the Barksdale crew had worked for, Stringer gives Major Colvin information on Avon's weapons stash. Brother Mouzone returns to Baltimore and tracks down Omar to join forces. Mouzone tells Avon that his shooting must be avenged. Avon, remembering how Stringer disregarded his order which resulted in Stringer's attempt to have Brother Mouzone killed, furious over D'Angelo's murder to which Stringer had confessed, and fearing Mouzone's ability to harm his reputation