What NBC drama starring Carroll O'Connor did Crystal R. Fox appear in? 
Crystal R. Fox:  She is best known for her roles as Luann Corbin in the NBC/CBS police drama series "In the Heat of the Night" (1989-1995), and as Hanna Young in the Oprah Winfrey Network prime time soap opera, "The Haves and the Have Nots" (2013–present). In the Heat of the Night (TV series):  It starred Carroll O'Connor as police chief William Gillespie, and Howard Rollins as police detective Virgil Tibbs.
"In the Heat of the Night"