Within days of the bombing, investigators began to focus their attention upon a KKK splinter group known as the "Cahaba Boys". The Cahaba Boys had formed earlier in 1963, as they felt that the KKK was becoming restrained and impotent in response to concessions granted to black people to end racial segregation. This group had previously been linked to several bomb attacks at black-owned businesses and the homes of black community leaders throughout the spring and summer of 1963. Although the Cahaba Boys had fewer than 30 active members, among them were Thomas Blanton Jr., Herman Cash, Robert Chambliss, and Bobby Cherry.