Introduced in the
tenth season premiere episode "Trials", Greylek maintains an unrelenting reputation unpopular with the detectives; she threatens to charge a defendant with a
hate crime for
raping two women and has a teenage boy charged with assaulting a police officer so he can be tested for
HIV. Further, her hands-on approach in accompanying the detectives is at odds with Detective
Elliot Stabler (
Christopher Meloni), who does not believe he is able to do his job with Greylek looking over his shoulder. However, Greylek has shown a softer side; warning Stabler to get a good defense attorney for his daughter Kathleen (Allison Siko), in the episode "
Swing". Kathleen, who has
bipolar disorder, is charged with breaking & entering in conjunction with theft, and the DA's office will prosecute her. In the episode "
Smut", Greylek successfully prosecutes serial rapist Eric Lutz (
Michael Trucco), who claims that his actions were caused by
violent pornography; Greylek tracks down Lutz's former fiancée, whom he also raped, and gets her to testify that Lutz does not use pornography and is simply violent by nature. Greylek also seeks justice when a man is brutally beaten outside a strip club, with the man's ex-wife and 13-year-old
transgender daughter Hailey (
Bridger Zadina) as the prime suspects, in the episode "
Transitions". Before the case gets to trial, detectives
Olivia Benson (
Mariska Hargitay) and Stabler discover that it was Haley's guidance counselor who committed the crime. During the trial, Greylek uncovers that the guidance counselor is also a transgender woman and that is why she tried to help Haley. The character is written out in episode "
Lead", during the middle of a trial where pediatrician Gilbert Keppler (Lawrence Arancio) is found guilty of molesting his patients. Greylek is last seen doing a press conference with Captain
Don Cragen (
Dann Florek), Benson, and Stabler on the steps of the courthouse. When the doctor's attorney hands the SVU squad a lawsuit, Greylek responds, "What did you people do?". Later in the episode, Benson and Stabler discover the doctor murdered in his home. The detectives hold
CSU out of the house until Cragen and Greylek get to the scene in case
IAB wants to "screw with" them again. Sergeant
John Munch (
Richard Belzer) asks if they are sure Greylek isn't on one of her I need to be at the crime scene' crusades again", when Detective
Fin Tutuola (
Ice-T) realises "It's not Greylek" and they all see ADA
Alexandra Cabot (
Stephanie March) walk up to the scene with Cragen. Cabot tells the detectives that the Justice Department called Greylek back to D.C. and that District Attorney
Jack McCoy (
Sam Waterston) let her leave immediately. ==Development==