Heidi Sobel is a homicide detective Glendale Police Department, and the partner of Lee Lankford. In 2003, when her partner was bribed by corrupt DEA agent James Marco, Sobel was not involved and not aware of her partner's criminal actions. In 2005 she and her partner investigated the murder of Raul Levin. While her partner focused on Mickey Haller as a suspect, Sobel was less certain about it. She also did not have the hostility towards Haller that her partner displayed.