On June 21, 1963, Byron De La Beckwith, a fertilizer salesman and member of the Citizens' Council (and later of the Ku Klux Klan), was arrested for Evers' murder. District Attorney and future governor Bill Waller prosecuted De La Beckwith. All-white juries in February and April 1964 deadlocked on De La Beckwith's guilt and failed to reach a verdict. At the time, most black people were still disenfranchised by Mississippi's constitution and voter registration practices; this meant they were also excluded from juries, which were drawn from the pool of registered voters.