Question

Even though Bryant and Milam admitted they murdered Emmett

Till why can't they be tried again for his murder?

Answer 1

If they already had a trial and were found not guilty then they can’t have another trial even if they admitted to it after

Answer 2

On January 24, 1956, Look magazine publishes the confessions of J.W. Milam and Roy Bryant, two white men from Mississippi who were acquitted in 1955.