1. Detective Stella Bonasera played by Melina Kanakaredes (Seasons 1-6 )
She's a CSI level 3 assistant supervisor. Left the crime lab after season 6.
2. Detective Jo Danville played by Sela Ward (Seasons 7-9 )
She use to work in the FBI crime lab. In the New York crime lab she's an CSI level 3 assistant supervisor.
3. Detective Aiden Burn played by Vanessa Ferlito (Season 1 and short time in season 2 )
She's a CSI level 2 and left in season 2 but in that same season it was revealed while investigating a case on her own, it ended up getting her killed.
4. Detective Lindsay Messer (previously Monroe) played by Anna Belknap (Seasons 2-9 )
She came to New York from Montana, she's a CSI level 3. She married fellow CSI Danny messer and had a daughter with him named Lucy.
5. Detective Jessica Angell played by Emmanuelle Vaugier (Seasons 3-5 )
She's a homicide detective, who was shot and killed at the end of season 5 while trying to transport a witness.
6. Detective Jamie Lovato played by Natalie Martinez (Season 9 )
She's a former narcotics detective, who got transferred to the homicide squad after her cover was blown.