A summation in court is the closing argument an attorney delivers to the judge or jury after both sides have finished presenting evidence, explaining why the facts in the record should lead to a verdict in that attorney’s favor. The U.S. Supreme Court has called it “a basic element of the adversary factfinding process in a criminal trial,” protected by the Sixth Amendment right to counsel.1Library of Congress. Herring v. New York, 422 U.S. 853 (1975) An opening statement previews what the evidence will show. A summation is pure argument about what the evidence already in the record means.
When It Happens and Who Goes First
A summation comes after both sides have “rested” their cases. All witnesses have been questioned, all exhibits have been offered, and no new evidence can be introduced. Closing arguments are then delivered before the judge gives the jury its final instructions on the law.2United States Department of Justice. Trial That order lets attorneys frame the evidence within the legal standards the jury is about to apply.
The side carrying the burden of proof argues first and also gets the last word. In federal criminal cases, the rule is fixed: the government argues first, the defense argues second, and the government gets a short rebuttal.3Legal Information Institute. Federal Rules of Criminal Procedure Rule 29.1 – Closing Argument Civil trials follow the same pattern, with the plaintiff going first and the defendant responding. Rebuttal is not a second full argument. It must respond to specific points the other side raised, and introducing brand-new arguments during rebuttal is considered improper.
What an Attorney Argues in a Summation
A summation usually restates the theme the attorney introduced in opening statements and walks the jury through the evidence that supports it. That means replaying moments from witness testimony, drawing attention to key exhibits, and pointing out details the jury might have missed over days or weeks of trial.
The attorney then ties those facts to the legal standards the judge will instruct the jury on. In a criminal case, the prosecutor walks through each element of the charged offense and argues that the evidence proves every one of them. The defense attorney focuses on whatever the prosecution failed to prove, because a gap in any single element should produce an acquittal. In a civil negligence case, the plaintiff’s attorney argues that the evidence shows the defendant owed a duty of care, breached it, and caused the plaintiff’s injuries. The defense counters by challenging one or more of those links.
Summations also involve attacking the other side’s case. Attorneys highlight inconsistencies in opposing witnesses’ testimony, point out possible bias, and argue why the opposing version of events does not hold together. In civil trials involving damages, the plaintiff’s attorney uses the summation to argue specific dollar amounts for medical bills, lost income, and other economic harm.
Visual Aids During Closing
Attorneys often use charts, timelines, diagrams, and slides during summation to help the jury follow the argument. Federal Rule of Evidence 107, which took effect in December 2024, formally governs these “illustrative aids.” A court can permit the use of a visual presentation if its value in helping the jury understand the argument is not substantially outweighed by the risk of unfair prejudice or confusion. Illustrative aids are not themselves evidence, and if the jury is allowed to review them during deliberations, the judge must instruct the jury that the aids cannot be treated as proof of any fact.4Legal Information Institute. Federal Rule of Evidence 107 – Illustrative Aids
What Attorneys Cannot Do
Summations give lawyers wide room to be persuasive, but several hard lines exist. They protect the jury’s ability to decide the case based on the evidence and the law.
No New Evidence
An argument must be based on evidence the jury has already seen and heard, plus reasonable inferences drawn from it. Mentioning facts that were never introduced, or referencing evidence the judge excluded, is improper and grounds for an immediate objection.
No Personal Opinions or Vouching
The American Bar Association’s Model Rules of Professional Conduct prohibit an attorney from stating a personal opinion about the guilt of the accused, the credibility of a witness, or the justness of a cause during trial.5American Bar Association. Model Rules of Professional Conduct Rule 3.4 – Fairness to Opposing Party and Counsel An attorney can argue forcefully that a witness is lying based on contradictions in testimony, but cannot say “I personally believe this witness is telling the truth.” A related violation, called vouching, happens when an attorney implies they have information outside the trial record that supports a witness’s credibility. “I’ve worked with this detective for years and he always gets it right” crosses the line because it injects the lawyer’s off-the-record experience into the jury’s deliberation.
No Appeals to Prejudice
Arguments designed to inflame the jury’s emotions or exploit biases based on race, religion, gender, or economic status are forbidden. Two specific variations trip up attorneys regularly. The first is the “golden rule” argument, where a lawyer asks jurors to imagine themselves in the injured party’s position and deliver the verdict they would want to receive. Courts reject this because it asks jurors to abandon objectivity. The second is the “send a message” argument, where a prosecutor urges the jury to convict in order to deter future crime or protect the community. In criminal trials, this is improper because it risks a conviction based on something other than the defendant’s actual guilt. In civil cases involving punitive damages, limited “send a message” framing may be allowed, since deterrence is part of what punitive damages are designed to accomplish.
No Comment on a Defendant’s Silence
The Fifth Amendment protects a criminal defendant’s right not to testify.6Library of Congress. U.S. Constitution – Fifth Amendment In Griffin v. California (1965), the Supreme Court held that the prosecution cannot comment on a defendant’s decision to stay off the witness stand or suggest to the jury that the silence implies guilt.7Justia. Griffin v. California, 380 U.S. 609 (1965) The right against self-incrimination would be meaningless if exercising it could be used against you.
What Happens if an Attorney Breaks the Rules
When an attorney crosses a line, opposing counsel’s first move is to object immediately, before the case goes to the jury. Waiting too long can waive the objection entirely.
For minor infractions, the judge typically issues a curative instruction telling the jury to disregard the improper comment. A good curative instruction specifically identifies what the jury should ignore rather than offering a vague reminder. Courts generally presume that juries follow these instructions.
More serious violations, like a sustained pattern of improper argument or a blatant appeal to racial prejudice, can lead to a mistrial, meaning the trial is thrown out and must start over. Judges treat mistrials as a last resort, but some conduct is too prejudicial for any instruction to cure. If the issue is not addressed adequately during trial, it can become grounds for appeal. Appellate courts look at whether the error likely affected the outcome, considering the trial as a whole. An isolated improper remark in a case with overwhelming evidence is unlikely to get a verdict overturned, but certain categories of misconduct can trigger a presumption that the error was harmful enough to require a new trial.
Can a Summation Be Skipped?
Closing argument is a constitutional right. In Herring v. New York (1975), the Supreme Court struck down a New York statute that allowed judges in bench trials to skip closing arguments entirely, holding that denying an accused the chance to deliver a summation “deprives the accused of the basic right to make his defense” under the Sixth Amendment.1Library of Congress. Herring v. New York, 422 U.S. 853 (1975) That protection extends to state courts through the Fourteenth Amendment.
A defendant can voluntarily waive the right to make a closing argument, but that choice carries a tactical consequence: in many jurisdictions, if the defense waives its closing, the prosecution loses its right to a rebuttal argument. Both sides can also jointly agree to waive closing arguments, though that is rare. Even when the right is preserved, judges have broad discretion to set reasonable time limits. In lengthy, complex trials the judge may allow hours per side; in a straightforward case, each side might get far less.