CHICAGO (AP) — Hillary Clinton is campaigning with the mother of a black suburban Chicago woman who was found dead in her jail cell following a traffic stop in Texas.

The Democratic presidential candidate will be joined by Geneva Reed-Veal, the mother of Sandra Bland, for a Wednesday rally in Chicago.

Bland died days after she was arrested last year by a white officer following a routine traffic stop. A medical examiner ruled her death a suicide, though Bland’s family has questioned that account and how the stop was handled.

The case became a symbol of mistreatment of blacks by law enforcement and inequalities in the criminal justice system.

Clinton and rival U.S. Sen. Bernie Sanders are working to appeal to minority voters in advance of contests in South Carolina and Nevada.

(TM and © Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)