CUMMING — A murder trial last week against a famous author featured a change of venue, expert testimony and rigorous cross examinations, before a controversial ruling of not guilty on all counts due to insanity. The proceedings were all the more remarkable given that no one in the Forsyth County courtroom Wednesday was old enough to drive. Eighth-graders from Liberty Middle School put famous American author Edgar Allan Poe on trial for emulating the murder from his short story “The Tell-Tale Heart.”