5.4 Roles of Court Actors
Key Takeaways
- The judge presides, rules on law, and (in a bench trial) decides the verdict; the jury decides facts in a jury trial.
- The prosecutor represents the state in criminal cases; the defense counsel represents the defendant; in civil cases the plaintiff's attorney and the defendant's attorney represent their clients.
- A witness testifies under oath to facts; an expert witness offers specialized opinion within their field.
- The bailiff maintains courtroom order; the clerk of court manages records and filings; the court reporter creates the verbatim record; the interpreter renders the record across the language barrier.
- A grand jury decides whether to indict; a petit (trial) jury decides guilt or liability; a probation officer supervises defendants and prepares presentence reports.
Quick Answer: Court actors include the judge (presides and rules on law), prosecutor (represents the state in criminal cases), defense counsel (represents the defendant), plaintiff (brings a civil case), defendant (accused in criminal or sued in civil), witness (testifies to facts), expert witness (gives specialized opinion), bailiff (courtroom order), clerk of court (records), court reporter (verbatim record), interpreter (language access), probation officer (supervision and presentence reports), jury (facts), and grand jury (indictment).
Why Actor Roles Matter
Area 2 court-related items may reference an actor's function to test whether you understand the proceeding. An item might ask, for example, who prepares the presentence report (the probation officer), or who renders the verbatim record (the court reporter). Interpreters also need to know these roles for their own work: you position yourself near the defendant or witness, you address the judge as "Your Honor," and you render questions from the prosecutor and answers from the defendant through the same third-person conduit.
Table of Court Actors
| Actor | Function | Where They Appear |
|---|---|---|
| Judge | Presides over the proceeding, rules on questions of law and admissibility of evidence, instructs the jury, and (in a bench trial) decides the verdict and sets the sentence. | All proceedings, from initial appearance through sentencing |
| Prosecutor / Prosecuting Attorney | Represents the state (the public) in criminal cases; decides whether to file charges, negotiates pleas, and tries the case. Called district attorney, state's attorney, or county attorney depending on jurisdiction. | Criminal cases only — initial appearance, pretrial, trial, sentencing |
| Defense Counsel | Represents the defendant; advises, investigates, files motions, cross-examines, and argues the defense. May be retained (private) or appointed (public defender or assigned counsel). | Criminal and civil; in civil, the defense counsel represents the defendant/respondent |
| Defendant | The person accused in a criminal case or sued in a civil case. Has the right to testify, to confront witnesses, and to be present at all critical stages (criminal). | Criminal and civil proceedings |
| Plaintiff | The party who brings a civil case by filing a complaint; seeks damages or other relief. In criminal cases the state is sometimes called the prosecution, not the plaintiff. | Civil cases (the state is the prosecuting party in criminal cases) |
| Witness | A person who testifies under oath to facts within their personal knowledge. Subject to direct and cross-examination. | Trial, deposition, preliminary hearing, grand jury (in limited cases) |
| Expert Witness | A person qualified by knowledge, skill, experience, training, or education who gives opinion testimony within their specialty. Must be qualified by the court. | Trial, deposition |
| Bailiff | A court officer who maintains order, escorts the defendant and jury, and handles exhibits and physical security. | Courtroom during proceedings |
| Clerk of Court | Maintains the court's files, dockets, and official records; administers oaths to witnesses and jurors; processes filings and fees. | All proceedings (administrative backbone) |
| Court Reporter | Creates the verbatim written record of proceedings (transcript); may use stenotype, voice writing, or electronic recording. | Trial, deposition, hearing — anywhere a verbatim record is needed |
| Interpreter | Renders spoken or signed communication across a language barrier so that the limited-English-proficient person can participate fully. Works in the first or third person per protocol. | Any proceeding where a party or witness needs language access |
| Probation Officer | Supervises defendants on probation; prepares the presentence investigation report (PSIR) to guide sentencing; may monitor compliance and report violations. | Sentencing, probation revocation, juvenile proceedings |
| Jury (Petit Jury) | The trial jury that hears evidence and decides guilt (criminal) or liability/damages (civil) based on the facts and the judge's instructions. | Trial only |
| Grand Jury | A larger jury (often 16–23) that hears evidence in secret presented by the prosecutor and decides whether to indict (true bill) or no-bill. Does not decide guilt. | Pretrial, criminal felonies only |
Distinguishing the Two Juries
A recurring exam point is the difference between the grand jury and the petit (trial) jury:
-
Grand jury — decides whether there is enough evidence to charge the defendant (indict). It meets pretrial, in secret, with only the prosecutor presenting evidence. The defendant and defense counsel are generally not present. A grand jury does not decide guilt.
-
Petit jury — the trial jury that decides guilt or liability after hearing both sides in open court. It decides the verdict based on the evidence and the judge's instructions.
A useful memory device: grand jury indicts; petit jury decides. "Petit" means small — the trial jury is smaller (often 6 or 12) than the grand jury (16–23).
Distinguishing Witness Types
A lay (fact) witness testifies to what they personally perceived — what they saw, heard, or did. They generally cannot give opinion testimony beyond that allowed for lay witnesses.
An expert witness is qualified by the court to give opinion testimony within a specialized field. The expert may rely on facts, data, and methods not all personally observed. The court must qualify the expert before they testify, and the opposing party may challenge the qualification (voir dire of the expert).
Distinguishing Civil and Criminal Parties
In a criminal case, the parties are the state (prosecution) and the defendant. There is no plaintiff.
In a civil case, the parties are the plaintiff (who filed the complaint) and the defendant (who is being sued). A civil case may also have third-party defendants, intervenors, or amicus curiae (friend of the court), but the basic structure is plaintiff v. defendant.
The Interpreter Among the Actors
The interpreter is a neutral officer of the court, not an advocate. The interpreter's duty is to the record and to the limited-English-proficient person's ability to participate — not to either side's case. The interpreter renders everything said in the first person (so that the defendant's words are in the defendant's own voice) or per the governing protocol, does not summarize, does not advise, and does not explain the law. Understanding where the interpreter sits among the other actors clarifies why neutrality is non-negotiable and why the interpreter does not side with the defendant or the prosecution.
Exam Scenario Hooks
- An item may ask who prepares the presentence report — the probation officer.
- An item may ask who decides whether to indict — the grand jury.
- An item may ask who creates the verbatim record — the court reporter.
- An item may ask who maintains courtroom order — the bailiff.
- An item may ask who represents the state in a criminal case — the prosecutor / prosecuting attorney.
Key Takeaways
- Judge rules on law; jury decides facts.
- Grand jury indicts; petit jury tries.
- Prosecutor is for criminal cases; plaintiff is for civil cases.
- Court reporter makes the record; interpreter bridges the language barrier; bailiff keeps order; clerk keeps files.
Who prepares the presentence investigation report (PSIR) that guides a judge's sentencing decision?
Which actor decides whether to return a true bill (indictment) after hearing evidence presented by the prosecutor in secret?
In a civil case, which party files the complaint and which party is sued?