The PBS show “Now” will look at the Anthony Graves case. Featured will be University of St. Thomas Associate Professor of Communications Nicole Casarez’s students who have been investigating Graves’ innocence. They were interviewed for the show the week before Christmas. The program will air this week on PBS stations across the country. Check your local listings for showtimes. The show will also feature the Ruben Cantu case, which seems to demonstrate the 1990s execution of an innocent man in the state of Texas.