Why Conspiracy Stays Separate

Why Conspiracy Stays Separate

The modern rule that a conspiracy and its completed object offense are distinct crimes rests on two justifications that work at different levels. The first is a reason of policy: a criminal agreement is dangerous in its own right, so punishing the agreement covers a harm that the punishment for the completed crime does not.¹ The second is a reason of statutory interpretation: when a legislature defines crimes without addressing the point, courts presume it meant to keep the long-established line between conspiracy and the offense that is its object, unless the legislature expressed an inconsistent intent.² Each reason answers a different question. The first asks why the law would want to punish the agreement separately, and the second asks how a court knows the legislature wanted that result when the statute is silent.

Both justifications come from the Supreme Court's discussion in Iannelli v. United States, which treated the separateness of the two crimes as traditional and then explained why that tradition holds.³ They reinforce one another. The policy reason supplies the substance of the distinction, and the interpretive presumption explains why a court honors the distinction even where nothing in the text demands it. On a new fact pattern, a student defending the no-merger rule can therefore give both: say what makes the group agreement an independent harm, and say that no inconsistent legislative expression displaces the traditional separation. The next two sections take these reasons in order, beginning with the danger of group crime and then turning to the presumption of separate offenses.

The Danger of Group Crime

The no-merger rule needs a reason, and the first reason the cases give concerns the nature of group crime. In Iannelli v. United States the Supreme Court explained that the long line of decisions allowing separate sentences for a conspiracy and its completed object rests on the nature of conspiracy itself, because a conspiracy poses dangers distinct from those of the substantive offense.⁴ The Court drew that explanation from its earlier decision in Callanan v. United States, which described three ways in which acting together changes the risk to the public.⁵ Each of the three rests on how people behave when they commit crime in company, and each is easier to hold once the mechanism is visible, so the paragraphs below take them one at a time.

The first strand is that concerted action makes success more likely and desistance less likely.⁶ The success half is the easy half: a plan that needs several hands, or that must get past an obstacle one person could not overcome, is more likely to be completed when the hands are available. The desistance half carries the subtler point. A lone offender who has second thoughts can simply stop, and nobody else is affected by the decision. Members of a group have made commitments to one another, so a member who wavers faces partners who remain committed, and the plan can go forward without the doubter or with the doubter pressed to stay. Each member's resolve is propped up by the others, which makes the criminal path harder to leave than it would be for a single actor.

The second strand is that group association makes possible ends more complex than one criminal could accomplish.⁷ A single offender is limited by what one person can know, carry, and do at the same moment. A group can divide the work, so that one member supplies inside information, another the equipment, and another the skill needed for the final step. A scheme that would be out of reach for every member acting alone then comes within reach of the group, and the harm it threatens is correspondingly larger.

The third strand is that the danger of a conspiratorial group is not confined to the end toward which it first set out. Combination in crime makes more likely the commission of crimes unrelated to the purpose for which the group was formed.⁸ A group assembled for one offense already has what a second offense requires: trust among its members, tools, a habit of cooperating, and a readiness to act. Those assets do not disappear when the first plan is finished, and they can be turned to a new target. The conclusion that follows is the one that carries the no-merger result. Punishment for the completed crime answers for that crime, and it leaves the standing danger of the partnership unaddressed unless the conspiracy is separately reached. Justice Jackson, who was generally critical of conspiracy law, accepted the same premise when he observed that a conspiracy may be an evil in itself, independent of any other evil it seeks to accomplish.⁹

Courts have treated this reasoning as strong enough to support results that look severe. The Court in Iannelli noted that it had even upheld punishing a conspiracy more harshly than the accomplishment of its purpose.¹⁰ Some statutes follow the same logic, since Michigan's conspiracy statute allows conspiracy to be punished more severely than the substantive offense in certain instances, which may reflect the greater dangers the rationale describes.¹¹ The rationale is a justification for treating the agreement as a separate wrong, and it applies wherever there is a collective agreement to commit a crime.

The two scenes differ in a single fact, which is the existence of an agreement between two or more people. The lone robber has no partner, so the partnership danger never arises, while the pair has a partnership whose danger the law treats as independent of the robbery. Students lose this issue when they assume that the completed object crime exhausts the group's danger, because that assumption is the merger instinct the modern rule abandoned.¹⁶ The rationale is contested where the group's only objective was the offense actually committed, and the Model Penal Code's critique of it comes later in this chapter.

Presumption of Separate Offenses

The group-danger rationale explains why the law would want to punish an agreement on its own. It cannot say what a court should do when the statutes defining conspiracy and the object offense never address how the two relate, and the second justification fills that gap. The Supreme Court has consistently attributed to Congress “a tacit purpose—in the absence of any inconsistent expression—to maintain a long-established distinction between offenses essentially different.”¹⁸ In Iannelli v. United States the Court traced that attribution to the historical difference between a conspiracy and its end, and applied it to the pairing of conspiracy with the crime it aims at.¹⁹ The result is a presumption of separate offenses. Unless the legislature has expressed an intent inconsistent with separateness, courts treat the agreement and the completed crime as two crimes.

The presumption works because of the way statutes are written. A legislature that defines conspiracy and a substantive offense is legislating against a background in which the two have long been different crimes, with the ordinary consequence that separate sentences can be imposed for the agreement and for its accomplishment.²⁰ A legislature that wanted the agreement absorbed into the completed crime would be departing from that background, and a departure of that size is something a legislature can be expected to say in the text. Silence is therefore read as leaving the background in place. The presumption also allocates the burden of argument, since the defendant who claims merger must find something in the legislation that is inconsistent with separateness, and the absence of any such expression decides the question the other way.²¹ A court gets a single stable default in place of a fresh round of guessing about legislative intent for every pair of statutes.

The presumption has a recognized exception, which is Wharton's Rule. The rule bars a conspiracy prosecution when the object offense by its nature requires two or more participants, as adultery does, and the Court describes it as an exception to the general principle of separateness.²³ Its footing is the same kind of reasoning as the presumption itself, because Iannelli treated Wharton's Rule as a judicial presumption about legislative intent and found a contrary legislative intent in the federal anti-gambling statute.²⁴ The exception is therefore not an absolute limit on conspiracy law and can be displaced by legislative expression in the same way the general presumption can.

The two scenes differ in one fact, which is whether the object offense can be committed by a single person. Manufacturing a drug can be done alone, so an agreement to do it adds a partnership that the offense itself does not contain. Adultery cannot be done alone, so the plurality of participants is already built into the definition of the object offense, and the agreement adds nothing beyond it. The exception's boundaries, including what changes when more people are involved than the offense requires, are taken up in the later comparison with merger and the doctrines that resemble it. Students lose this issue when they read a statute's silence as an instruction to merge the offenses, when the presumption points the opposite way.²⁶