Introduction

Common-Law Merger

Introduction

One episode of conduct can satisfy the definitions of several crimes at once, and a prosecutor who sees that overlap may charge every offense the evidence fits. The State is generally free to investigate the episode and to accuse the defendant under each of those definitions. The question that remains comes at the end of the case, when the defendant stands convicted of several offenses that all grew out of the same events: may every one of those convictions stand? Merger is the common-law doctrine that answers it.¹ Because the doctrine governs convictions, it limits the judgment a court may enter once the charges are resolved, and it leaves the State's power to investigate or to charge in the alternative untouched.

The reason for the doctrine lies in the structure of overlapping offenses. If the conduct that makes up one crime is already a component of a more serious crime, a conviction for the serious crime condemns that conduct in full, and a second conviction for the smaller piece condemns and punishes the same conduct a second time. Charging every available offense also gives a prosecutor a way to build up a defendant's record of convictions, and merger removes the reward for doing so when the extra convictions add nothing. Common-law courts sorted these situations with two questions asked in order. The first is whether the offenses arose from the same act or transaction, because offenses that spring from separate conduct do not overlap and merger is not in play. The second question is reached only when the answer to the first is yes. It compares the grades of the offenses, meaning their classification by seriousness, with felonies as the more serious class and misdemeanors as the less serious, to see whether one offense outranks the other or the two stand as equals.

The common-law rule appears in two parallel formulations, and each makes the same-transaction inquiry and the comparison of grades the decisive steps.² Where a misdemeanor formed part of the conduct constituting a felony, and both arose from the same act or transaction, the misdemeanor merged into the felony, so the defendant could be convicted of the felony but not of the misdemeanor as well.³ This chapter takes the common-law rules in order and then asks how much of the doctrine survives in modern American law. The first rule, the merger of a misdemeanor into a related felony, comes next.