Reasonable Doubts, on NBC
IMDb; TV.com; TV Tango; Wikipedia
This ran for two seasons, from 1991-93. (I didn't get NBC at the time, but I'm pretty sure my CBS affiliate aired it just before prime time.) Marlee Matlin played Tess Kaufman, an Assistant District Attorney who was passionate about defending her clients. She worked closely with a cop named Dickie Cobb (Mark Harmon). I also vaguely recall some other characters, I guess. I'm afraid I don't really remember anything very specific about the show, but I know that while it lasted, I thought it was pretty great. So I wouldn't mind seeing it again someday, if possible.