 Robert "Bobby" DeLaughter is a prosecutor, judge, and author notable for prosecuting and securing the conviction of a white supremacist and Klansman who was convicted of assassinating what civil rights leader?   
Medgar Wiley Evers
Title: Medgar Evers
Passage: Medgar Wiley Evers (July 2, 1925June 12, 1963) was an American civil rights activist from Mississippi who worked to overturn segregation at the University of Mississippi and enact social justice and voting rights.  He was murdered by a white supremacist and Klansman.
Title: Bobby DeLaughter
Passage: Robert "Bobby" DeLaughter (born February 28, 1954) is an American Mississippi state prosecutor, judge, and author.  He is notable for prosecuting and securing the conviction in 1994 of Byron De La Beckwith, charged with the murder of the civil rights leader Medgar Evers on June 12, 1963.  Two earlier trials in Mississippi in 1964 had resulted in hung juries.
Title: Byron De La Beckwith
Passage: Byron De La Beckwith, Sr. (November 9, 1920 – January 21, 2001) was an American white supremacist and Klansman from Greenwood, Mississippi, who in 1994 was convicted of assassinating civil rights leader Medgar Wiley Evers on June 12, 1963.  Two previous trials in 1964 on this charge had resulted in hung juries.  Seven years after being convicted of killing Evers, De La Beckwith died in prison in 2001 at the age of 80 while serving a life sentence.
Byron De La Beckwith Bobby DeLaughter