Though she worked in Internal Affairs and had no field experience, she announced that because she had completed the qualification course for supervisors she was already capable of running a detective squad. Susan Dalto ( Denise Crosby) - An obnoxious supervisor who immediately got off on the wrong foot with the 15th Precinct when she was assigned as Fancy's replacement. They quickly overcame these difficulties and began to work as an effective team. Partnered with Rita Ortiz, Ortiz was initially concerned at what she believed was Murphy's overly flirtatious attitude with fellow cops, including John Clark. As she explained to her co-workers, Murphy was from a family of brothers and cousins who were all New York City firefighters. Murphy was the long-term replacement for Connie McDowell after Connie married Andy Sipowicz, then became a stay at home mother.
The other 15th Squad detectives engineered Don's arrest in a way that enabled Jill to avoid being arrested with him, after which she and her sons fled New York City to avoid police and prosecutors. Don committed crimes with Harry Denby and manipulated Jill into aiding him by threatening to inform on her to Internal Affairs or kill their children.
A highly skilled detective, her inability to break free of her ex-husband Don ended her career. Jill Kirkendall - Diane Russell's partner, she was a recurring character in Season 3 and a regular from Seasons 4 to 7.Martinez broke up with her and she later left the 15th Precinct. Martinez and Lesniak later dated, but Lesniak's jealousy caused her to become over possessive. When James Martinez expressed a romantic interest, she brushed him off by telling him she was gay. The former boyfriend began stalking her, which caused her to avoid dating colleagues. Adrienne Lesniak - (Seasons 2–3) An experienced detective who transferred in to the 15th Squad after her relationship with a co-worker at her old precinct went public.