 Hickman was further involved with The National Association for the Advancement of Colored People (NAACP), documenting inequality in Dallas, Texas, such as photographing the Dallas school segregation for the NAACP's court cases.The publication of Hickman's book, "Behold the People" (1994), highlights the many photographs taken by Hickman during the time of the Civil Rights movements.Hickman's work tends to convey the everyday life of African-American citizens during the Civil Rights Movement era, specifically documenting subjects such as schools, universities, clubs and restaurants.