<Li> Louann "Crystal" Turner, played by Jennifer Esposito: She is a former meth addict who runs an outreach program for homeless teenagers . She had a relationship with Vincent and worked with him until they witness a young prostitute get murdered . She goes on a bender and tries to seduce Vincent . When she gets sober, she realizes they can't work together and she arranges for him to work at a youth detention center to teach a creative writing class . </Li> <Li> Graciela Reyes, played by Tara Correa - McMullen: She is a gang member Amy counsels . As time passes, she makes progress, though she is arrested one day for murder, as she was in the car with her cousin when she was involved in a drive - by shooting . Graciela is tried and found guilty as an adult because of a cousin's lies on the witness stand, and thus being sent to adult prison . The cousin later recants, but Graciela is murdered in a gang retaliation before Amy can get her out of prison . </Li> <Li> Rob Holbrook, played by Jim Parsons: He is a young clerk hired by Amy to replace Donna after her departure . Innocent and extremely eager to please, he proves his worth when his knowledge of Spanish comes into play in a case . Later, when Amy is banned from Graciela's trial, he goes in her stead and reports back to her all that happens . He enjoys cake and playing ball . </Li> <Li> Courtney Messina, played by Jossara Jinaro: She is Ignacio Messina's (Cheech Marin) daughter and Sean Potter's (Timothy Omundson) girlfriend . </Li>

Who did jim parsons play in judging amy