The Aztec judicial system was made up of multiple courts with differing levels of jurisdiction. These included the trial courts, appellate courts, and a supreme court. The trial courts were known as Teccalli courts, and heard civil and criminal cases involving commoners.
A criminal case begins with a person suspected of a crime is indicted by a grand jury or otherwise charged with the offense by a government official called a prosecutor or district attorney.
They built irrigation canals to make more wet ground (not only near Nile river).