Federal question cases are civil cases heard when a person who brings a case is going against federal law. It is a law applied in the United States when a plaintiff goes against a treaty in which the US is part of or when the constitution of the United States is been violated.
This is a difficult situation. If a juror would see the defendant crying it could impose that they are sorry for what they did if they were guilty. Dressing appropriately can show you're not a bum and do have dignity. Acting appropriately can impose you are mature.