Athens
Like the United States today, Athens had courts where a wrong might be righted. Since any citizen might accuse another of a crime, the Athenian courts of law were very busy. In fact, unless a citizen was unusually peaceful or very unimportant, he would be sure to find himself in the courts at least once every few years.
At a trial, both the accuser and the person accused were allowed a certain time to speak. The length of time was marked by a water clock. Free men testified under oath as they do today, but the oath of a slave was counted as worthless.
To judge a trial, a jury was chosen from the members of the assembly who had reached 30 years of age. The Athenian juries were very large, often consisting of 201, 401, 501, 1,001, or more men, depending upon the importance of the case being tried. The juryman swore by the gods to listen carefully to both sides of the question and to give his honest opinion of the case. Each juryman gave his decision by depositing a white or black stone in a box. To keep citizens from being too careless in accusing each other, there was a rule that if the person accused did not receive a certain number of negative votes, the accuser was condemned instead.