MADISON, Wis. — In the wake of a public relations nightmare over a campus mural glorifying a cop killer, Marquette University has cut ties with director of its Gender and Sexuality Resource Center. “Susannah Bartlow is no longer an employee with Marquette University,” said University Spokesman Brian Dorrington told Marquette Wire. “We will work with the Center’s advisory board to search for a new director so that we can continue to grow the important programs in the Center.” Marquette administrators had the mural of black militant Assata Shakur (formerly known as JoAnne Deborah Chesimard) removed Sunday evening, but not until,...