Atrial court in the federal system is

A trial court in the federal system is a district court

Trial courts in the federal system are district courts. The district courts have authority to first preside over cases (original jurisdiction) which may be civil or criminal federal cases. In the district courts, cases are tried, witnesses testify and judgments are made by federal juries. There are about 94 federal district courts in the United States.

chavez's example shows that nonviolent protest can work well. it shows that one nonviolent man can stop a mob, which proves chavez's point and persuades people to protest nonviolently.