Concept
The Traditional Merger Rule
Merger
The Traditional Merger Rule
The merger rule governed what happened at the end of a successful criminal plan. The sequence has three steps: the parties agreed to commit an offense, they carried it out, and the object crime was completed. Once that happened, the agreement had produced the very offense it was aimed at, and the common law treated the conspiracy as absorbed into the completed crime.1 The participants could be convicted of the substantive offense, meaning the object crime itself. The law did not permit a separate conviction for conspiracy resting on the same agreement and the same completed offense.2 The conviction for the greater wrong therefore stood alone, and the lesser wrong, the agreement, left no independent conviction behind.
The rule speaks only to a conspiracy whose object offense was actually completed, since a plan that was never carried out has no completed crime to merge into. That condition marks the boundary between the cases where the rule applied and the cases where it did not reach, and the two subsections below take them in that order.3 The rule also depends on a particular legal setting: it took its shape from the common law's way of classifying offenses and from the procedures attached to each class, with the felony/misdemeanor distinction doing most of the work. Keeping that setting in view makes the rule intelligible as a product of its classification system, and it prepares the later explanation of why the rule fell away once that system no longer supported it.
Merger Into the Completed Felony
The old rule about merger took effect at the moment a criminal plan succeeded. When the conspirators carried out the substantive offense that was the object of their agreement, the conspiracy merged into that completed crime. Merger here means that the lesser wrong was absorbed into the greater and no longer stood as a separate ground for conviction.4 The participants could be convicted of the object offense, but the law did not permit a second, separate conviction for conspiracy based on the same agreement and the same completed offense.5 Everything described in this subsection is the traditional rule, which has since been abandoned, and the reasons for that change come later in this chapter.6
The rule took this shape because of how the common law classified conspiracy. With the single exception of conspiracy to commit treason, every conspiracy was a misdemeanor, so a conspiracy to commit a felony and the felony itself belonged to different classes of offense.7 Trials of felonies and trials of misdemeanors followed significantly different procedures, and a prosecution that pursued both for one course of conduct would have had to combine two charges that the system handled in different ways. The doctrine resolved that mismatch by treating the misdemeanor as merged into the felony whenever a felony was committed in furtherance of the conspiracy.8 The rule therefore grew out of the common law's classification system, which explains where it applied and why it later lost its footing.
The second consequence is the one that separates merger from a simple ban on double punishment. A rule that only forbade stacked sentences would still let the state choose a conspiracy conviction in place of the felony conviction, but merger closed that door too, because proof of the felony itself defeated any conspiracy conviction.11 Both consequences flow from the same source, the absorption of the misdemeanor into the felony, and neither needed any showing beyond the completed felony.
Merger needed a completed object offense, because a conspiracy can be absorbed only into a crime that actually exists. The condition is easiest to see by holding the agreement constant and varying whether the plan was carried out.
Only one fact moved the answer. The parties, the agreement, and the felony class of the object were identical in both scenes, and the completion of the burglary alone decided whether the conspiracy survived. Students lose this issue when they apply merger to an object offense that was never completed, because an unfinished plan leaves the conspiracy with nothing to merge into.14 Two further limits on the rule, both tied to the felony/misdemeanor mismatch, are taken up in the next subsection.
Where Merger Did Not Apply
Merger absorbed a lesser offense into a greater one, and the old rule worked only because conspiracy and the completed felony sat in different classes of crime. At common law every conspiracy except conspiracy to commit treason was a misdemeanor, so a felony committed in furtherance of the agreement placed a misdemeanor beside a felony, and the two were tried under significantly different procedures.16 Merger was the device that resolved that mismatch. It follows that the rule had no work to do wherever the mismatch was missing, and the problem did not exist if the completed offense was a misdemeanor or if a statute made conspiracy a felony.17 Those two situations, together with a related principle about offenses of equal degree, mark the limits of the old rule. They are limits on the traditional doctrine only, because the modern rule dispenses with merger altogether and is taken up later in this chapter.18
The examples below are labeled by outcome. In the first two, merger does not apply and the conspiracy conviction survives; in the last, merger does apply and only the completed offense supports a conviction. Reading them together shows which fact carries the result.
The first limit arises when the object crime the conspirators completed was itself a misdemeanor. Merger absorbed a misdemeanor into a felony, and a misdemeanor conspiracy beside a completed misdemeanor involves two offenses of the same class, tried under the same procedures. With no felony to merge into, the reason for the doctrine is gone, and the rule does not reach the case.19
The second limit comes from legislation. A statute that makes conspiracy a felony removes the class difference from the other side: the agreement now has the same grade as a completed felony, so no misdemeanor sits beside a felony and no procedural mismatch needs resolving.21
Both limits rest on the same reasoning, and a third point follows from the same structure. Merger ran in one direction only, from a lesser offense into a greater one. Offenses of the same degree arising from a single transaction stood side by side at common law, because neither was the lesser and so neither could be absorbed by the other. That principle adds nothing independent to the analysis beyond confirming that merger required a lesser-into-greater relationship, and it should not be stretched into a broader rule about overlapping charges.
The contrast pole shows what the doctrine did cover. Hold the agreement constant and raise the grade of the object offense, and the result reverses.
Between the petty theft scene and the robbery scene, the only change is the grade of the completed offense, and that change decides whether the conspiracy survives. Between the statutory-felony scene and the robbery scene, the only change is how the jurisdiction classifies conspiracy. Merger therefore needed two things at once: a completed object offense, as the previous subsection showed, and a felony large enough to absorb a misdemeanor conspiracy.24 Students lose this issue when they apply merger as soon as a conspiracy and a completed crime appear together, without checking the grade of the completed offense and of the conspiracy.25