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She was second-in-command of the night shift for the first four seasons, assuming command when Grissom was out of town or otherwise on leave, and has often quarreled with Grissom and Eckley when she feels her authority is compromised. She has often requested promotions or ways to spend more time with her teenage daughter. Katherine's ex-husband, Eddie, and her father, Sam, were both murdered on episodes of the program. Willows, who has an open crush on her teammate Warrick Brown, holds a Bachelor of Science in Medical Technology from UNLV. She supported herself through college by working as an exotic dancer. This character is loosely based in real life CSI Yolanda McCleary.

(wikipedia.org)