Where did double jeopardy start?... (I am also from KY and proud, however, double jeopardy has been around a lot longer than KY.)
In 355 B.C. Athenian statesmen Demosthenes said that the "law forbids the same man to be tried twice on the same issue." The Romans codified this principle in the Digest of Justinian in 533 A. D. The principle also survived the Dark Ages (400-1066 A.D.) through the canon law and the teachings of early Christian writers.