 When money is provided for investigation into the "serial killer," which McNulty redirects to the Stanfield investigation, more surveillance officers are added and Sydnor works out that the code is relaying location information for face-to-face meetings.In Freamon's resulting bust, most of the Stanfield Organization is arrested and a large quantity of heroin is confiscated.Freamon is upset when McNulty tells Greggs about the fake serial-killer plan.