Herman Frank Cash
At the time of the bombing, Cash was married to Myrtle Cash and had had two children, both of whom were in their twenties. He was a truck driver for Dixie-Ohio Express Company. Cash was a member of United Klans of America, a Ku Klux Klan organization.
Although officially named by the Federal Bureau of Investigation as a suspect as early as 1965, Cash was never formally charged with any crime. He maintained his innocence and passed a polygraph test given by the FBI. Acquaintances claimed that Cash was too nervous to be capable of committing a crime of the magnitude of the bombing. The other suspects named by the FBI, Robert Chambliss, Bobby Frank Cherry, and Thomas Blanton, Jr, were all convicted of the bombing.