Complex sentence: He represented many controversial figures, such as Malcolm X. Sutton and his brother Oliver later helped to cover Betty Shabazz's expenses after the murder of her husband, Malcolm X. His civil rights advocacy took him even further in the minds of many.
Split into simpler sentences: He represented many controversial figures, such as Malcolm X. After the murder of Malcolm X, Sutton and his brother Oliver helped to cover the expenses of his widow, Betty Shabazz. Sutton's civil-rights advocacy took him even further in the minds of many.