who killed abraham lincoln and why?
<answer> John Wilkes Booth, beacause angry at how the Civil War was fought and the fact that General Ulysses S. Grant stopped the prisoner-of-war exchange toward the end of the war. <context> President Lincoln was killed because the conspirators, especially John Wilkes Booth, were angry at how the Civil War was fought and the fact that General Ulysses S. Grant stopped the prisoner-of-war exchange toward the end of the war.