Final answer:
After being acquitted, Roy Bryant and J.W. Milam confessed to murdering Emmett Till but could not be retried due to double jeopardy. Their case highlighted racial injustices and spurred civil rights activism.
Step-by-step explanation:
After Roy Bryant and J.W. Milam were acquitted for the murder of Emmett Till, they later publicly admitted to the crime in a magazine interview. Despite their confession, the constitutional protection of double jeopardy prevented them from being tried again for the same crime. This case, along with others such as the Scottsboro Boys, illuminated systemic racial injustice in the American legal system during that era. These events played a significant role in increasing awareness and activism that contributed to the growth of the civil rights movement.