This is the clause that allows the U.S. government to arrest John Doe and other persons suspected of breaking federal laws. And there needs to be a fair way to decide who did what to whom, and what shall be done about it. First, there is the law itself. These books sit on every lawyer's bookshelf as surely as a dictionary sits on an English teacher's desk. In one of these books, you will find an act of Congress passed in 1909.
Someone breaks into a post office late at night in a town near Pittsburgh, Pennsylvania.
The burglary is discovered the next morning and the search begins for the lawbreaker. But the U.S. Postal Service has its own agents and inspectors. The postal inspector for the Pittsburgh area finds clues that lead to the arrest of John Doe, an unemployed steelworker. This is a question for a federal grand jury. The clerk in the U.S. court in Pittsburgh asks 23 citizens to act as a grand jury in this case.