Being summoned for jury duty begins a process with defined stages, each governed by rules that determine who ultimately decides a case. The stages are more structured than the summons suggests.
The pool comes from public lists
Courts assemble source lists from voter registration, driver licensing and sometimes tax or benefit records, depending on the jurisdiction.
Names are drawn at random to form a pool, and summonses are mailed. The goal stated in law is a panel drawn from a fair cross-section of the community.
Undeliverable mail and non-response reduce the pool unevenly, which is a documented source of demographic differences between the community and the people who appear.
Qualification precedes selection
Prospective jurors must meet statutory requirements, typically citizenship, residency, age and English proficiency, with disqualification for certain criminal convictions.
Excuses and deferrals are granted for hardship, caregiving obligations or medical reasons, under standards that vary considerably between courts.
Those remaining form the panel from which a jury will be chosen for a particular case, and they are brought into the courtroom together.
Questioning narrows the panel
The examination stage, known as voir dire, allows the judge and attorneys to ask about experiences, opinions and connections relevant to the case.
Practice differs sharply: some courts allow attorneys extended questioning, while others have the judge conduct it with limited attorney participation.
The stated purpose is identifying bias. Attorneys also use the time to assess who will be receptive to their case, which is a distinct objective.
Two kinds of challenge remove jurors
A challenge for cause argues that a specific juror cannot be impartial and requires the judge's agreement. There is no limit on the number.
A peremptory challenge removes a juror without stated reason, and each side receives a fixed number set by rule, varying by case type.
Constitutional decisions prohibit using peremptory challenges on the basis of race or sex, creating a procedure where an opponent may object and demand a neutral explanation.
Alternates and sequestration are exceptions
Courts seat alternates who hear everything and replace jurors who become unavailable. Long trials seat more of them.
Sequestration, isolating jurors from outside contact, is now rare and reserved for unusual circumstances, because it is costly and burdensome for those serving.
More common are instructions to avoid coverage of the case and to refrain from independent research, an obligation that has become harder to police as information reaches jurors on personal devices.