Concept

Reasonable Cooling Time

Common-law adequate provocation (heat of passion)

Reasonable Cooling Time

The third step returns to the ordinary person. Once the event is adequate (step one) and the defendant was in fact provoked (step two), the claim must still survive the passage of time between the provocation and the killing. The common-law requirement is that there must not have been sufficient time between the provocation and the killing for a reasonable person's passion to cool.¹ The question is what time would have done to the passion of an ordinary person struck by the same event, which makes this step the second objective measure alongside step one. Whether this defendant actually calmed down is a different inquiry, and it belongs to step four.

The reason for the step follows from what the doctrine mitigates. A provoked killing is treated more leniently because it comes from a temporary excitement that disturbs the control of reason, and Maher v. People reduces the offense only when the killing occurs "before a reasonable time has elapsed for the blood to cool and reason to resume its habitual control."² Passion is a state that fades, and as it fades judgment returns, so a killing carried out after the fading reflects a choice rather than an eruption. An older statutory formulation makes the same point: an interval long enough for "the voice of reason and humanity to be heard" converts the killing into deliberate revenge, which is punished as murder.³ Cooling time is therefore the place where the law stops treating the act as an outburst and starts treating it as retaliation.

The standard is a reasonable person's passion rather than this defendant's, and the choice has a purpose. If the clock ran on each defendant's own temperament, a person who kept brooding over the wrong would hold the window open by the very act of dwelling on it, and the rule would reward the nursing of a grievance. The majority view accordingly denies the manslaughter reduction when enough time passed for a reasonable person to cool, even if the defendant, being slower to cool than most people, had not in fact cooled when the fatal blow fell.⁴ One description of the common-law formula states it just this way: even a provocation of the right kind was inadequate once enough time had passed for the reasonable man's passions to cool, whether or not the actor's own thermometer had registered any decline.⁵ A minority of jurisdictions drops the reasonable-time test and asks only whether the defendant in fact had not cooled, which makes manslaughter available to the slow-cooling defendant.⁶ On an exam, the majority rule is the default. Its strictness is one of the features critics later pointed to when the Model Penal Code proposed the broader standard of "extreme mental or emotional disturbance."⁷

The contrast between acting at once and leaving, arming, and returning shows how time and conduct feed the question. In the standard illustration, Owen comes home early, catches his wife with Lloyd, and, inflamed by rage, reaches for the loaded gun in his bedside table and fires. The point of the illustration is that he acted immediately rather than leaving the house, buying a gun, and coming back to kill Lloyd.⁸ Immediate action leaves no interval at all, so there was no time in which a reasonable person's passion could have subsided, and this step is met. Now run the contrast the illustration itself draws: the husband finds the couple, leaves the house, buys a gun, and comes back hours later to kill the other man. The interval is long, and what filled it matters too, because traveling, choosing a weapon, and obtaining it are the activities of a person whose reason is directing events. A reasonable person provoked by the same sight would have had time to cool, so the step fails and the killing remains murder. That the husband may have been genuinely furious throughout does not change the result, since this step asks about a reasonable person.

How Long Is Long Enough

The common law fixes no number of minutes or hours for the cooling period. What counts as a reasonable time depends on the nature of the provocation and the circumstances surrounding its occurrence.⁹ The standard measures how long a reasonable person's passion lasts after one particular event, and events differ in how much rage they produce and how quickly it fades. Those circumstances include earlier altercations between the parties. As the earlier treatment of past wrongs explained, history cannot supply the provocation, but it forms the setting in which a new event is felt, and a blow that ends a long-running quarrel may land on feelings that were already inflamed.

Hypothetical Illustration

Two defendants are each struck hard across the face and, after the same trip home to fetch a rifle and back, each shoots the person who hit her. The first was struck by a stranger in a parking-lot dispute. The second was struck by a neighbor who had attacked her on several earlier occasions, most recently only days before. The law supplies no number of minutes for either case, so each turns on what a reasonable person would have felt after that particular event. For the first defendant, the trip and the fetching of a weapon point toward a reasonable person having settled, and the step probably fails. For the second, the earlier attacks are part of the setting, and a jury could find that a blow ending a continuing conflict keeps a reasonable person's passion burning longer, so the same trip may leave the question open.

Who decides the length of a reasonable period varies by jurisdiction. A common formulation treats it as a question of fact for the jury, unless the time is so short or so long that the court may hold, as a matter of law, that it was reasonable or unreasonable.¹⁰ Some courts instead treat the duration of a reasonable cooling period as a question of law for the judge, while others give it to the jury.¹¹ The extremes explain why a judge ever decides it. When a killing follows the provocation within moments in a confrontation that never paused, no rational juror could find that a reasonable person had already cooled, and when the killer let a long time pass and went about other business, no rational juror could find that passion still held control. In the wide middle, where most exam stems sit, the question is one of degree on which the stem's facts support arguments both ways.

When the Clock Restarts

A passion that has died down can flare again, and the cooling inquiry accounts for that. When enough time passes for passion to subside, and a new event then rekindles it, the cooling period starts with the new event if that event would trigger the passion of a reasonable person, although the cases have not always recognized this.¹² A series of provocations follows the same logic: a reasonable provocation can build over a considerable span of time, and the period is then measured from the last provocative event.¹³ The rule asks how long a reasonable person's passion lasts once provoked, and a fresh qualifying event provokes that person anew. Counting from the older event would penalize the defendant for a calm that the new provocation had already ended.

The stare fails to restart the clock because the new event must meet the adequacy step by itself, and an affronting gesture appears among the provocations the traditional list treats as insufficient.¹⁴ A reminder of the old wrong adds nothing new, which is the same reasoning that kept a stale grievance from ever counting as provocation. The restart rule therefore extends the window only for a real second provocation and never for a memory of the first.

Exam Analysis Steps

Because the length of a reasonable cooling period is fact-sensitive, the step is best run by fixing the right starting point and then reading what happened in the interval. The steps are these:

Identify the last event that was capable of provoking an ordinary person, treating a fresh qualifying event after an earlier calm as the new starting point and measuring a series of provocations from its final event.
Measure the interval between that event and the fatal act, without looking for a fixed number of minutes or hours.
Read the defendant's conduct in the interval, asking whether the defendant stayed in the confrontation or instead left, traveled, obtained a weapon, or otherwise acted like a person whose reason was in charge.
Ask whether a reasonable person provoked by that event, in light of the surrounding circumstances including earlier altercations between the parties, would still have been in a passion when the fatal act occurred.
Decide who answers that question: the court if the interval is so short or so long that only one answer is possible, and otherwise the jury, with arguments on both sides.
If a reasonable person would have cooled, conclude that the killing remains murder under the majority rule without asking whether this defendant had cooled, and if a reasonable person would not have cooled, move on to step four.

The trap is asking how long this defendant stayed angry, because that question belongs to the next step and the majority rule makes it irrelevant here. A student who writes that the defendant was still furious hours later has answered a subjective question and left the objective one open. The stem usually supplies the material for the objective answer in the defendant's conduct during the interval, and the minority view, which drops the reasonable-time test, applies only when the stem or the jurisdiction says so.