Concept
Three Routes to Accountability
Model Penal Code liability for conduct of another
Three Routes to Accountability
Section 2.06(1) establishes that a person can be guilty of an offense through another person's conduct, but it does not say when that happens.1 Subsection (2) answers that question. It opens by declaring that a person is legally accountable for the conduct of another when one of three conditions is met, and it then lists them as alternatives.2 The defendant, acting with the kind of culpability sufficient for the offense, may cause an innocent or irresponsible person to engage in the conduct. The Code or the law defining the offense may make the defendant accountable for it. Or the defendant may be an accomplice of the other person in committing the offense.3 Each condition is taken up in its own subsection below, and the first two are brief because the third carries most of the doctrine.
The list is closed, and the closure is deliberate. Each route demands an independent basis for blaming the defendant, apart from the bare fact that someone else committed the offense. In the first route the basis is the defendant's own culpable use of another person as an instrument. In the second it is a legislative decision, made in defining a particular offense, to attribute one person's conduct to another. In the third it is the defendant's own purposeful participation in the offense. If the law allowed attribution on some looser ground, such as friendship, family tie, or benefit from the outcome, a defendant could be convicted for what someone else did without any culpability of the defendant's own. Students lose this issue when they treat association with the actor as if it were a route, because nothing in subsection (2) makes closeness to the wrongdoer a basis for guilt.
Because the routes are exhaustive, they can be run as a checklist on any fact pattern in which the person charged did not personally perform the conduct.
The routes can overlap, and subsection (1) anticipates as much when it makes a defendant guilty by his own conduct, by another's, or both. A defendant who plans an offense and also carries part of it out is accountable on more than one basis at once. For that reason the analysis should not stop at the first route that fits. The question is which route the facts support, and the label the parties use for the defendant's role does not settle it.
The two versions of the scheme reach the same liability through different routes, and what separates them is the other person's state of mind. That is why the checklist asks about the actor's innocence or responsibility before it asks anything about accomplices.
Using an Innocent Agent
The first gateway in § 2.06(2) covers a defendant who never performs the offense personally but arranges for someone else to perform it without guilt. The text makes a person accountable for another's conduct when, "acting with the kind of culpability that is sufficient for the commission of the offense, he causes an innocent or irresponsible person to engage in such conduct."9 Two conditions must therefore hold at once. The first describes the person who acts: that person must be innocent or irresponsible. The second describes the defendant: he must have the mental state the offense demands. When both hold, the agent's act is treated as the defendant's own, and the defendant is guilty of the offense as though he had done the act himself.10
The two kinds of agent escape guilt for different reasons. An innocent agent is a person who lacks the mental state for the offense because of ignorance or deception, as when a principal tricks someone into acting without revealing the illegal purpose.11 An irresponsible agent is a person who cannot be held answerable for the act because of youth or mental incapacity. A standard teaching variation on a burglary problem shows the second kind: an adult asks a six-year-old child to go through a window and take food from a house, and the adult is guilty of burglary through the child.12 The child's body performs the act, and the adult's purpose supplies the offense.
The reason for attributing the agent's act to the defendant lies in how control works. A defendant who sends a deceived or incapable person to do the act uses that person the way one uses a tool, and the resulting harm is exactly the harm the defendant wanted. One is no less guilty because the overt conduct came from an innocent or irresponsible agent, and the defendant answers as if the conduct were his own.13 The route also closes a gap. Accomplice liability is derivative, meaning it depends on a principal's violating the law, and the agent's innocence removes any guilt that could be shared. The Code therefore gives the manipulator a basis for accountability that does not depend on the agent's guilt at all. Nor is this vicarious liability in disguise. Liability is never imposed merely because of a relationship between the parties; it requires culpability and conduct by the person charged that make blame appropriate.14 Here the culpability is the defendant's own mental state, and the conduct is causing the agent to act.
The twin shows what the statute leaves to the defendant. The route attributes the agent's conduct to the defendant, and the defendant's mental state must come from the defendant. Without that limit, anyone whose carelessness set an unwitting person in motion would answer for an offense requiring purpose, and a fault-based crime would become a strict-liability crime through the back door. Because the statute asks for "the kind of culpability that is sufficient for the commission of the offense," the requirement tracks the offense charged.15 Where the offense is one that negligence satisfies, negligence in setting the agent in motion can suffice. Where the offense requires purpose, only purpose will do.
The other variable is the agent's knowledge, and changing it moves the case to a different gateway.
Because the route has two moving parts, one belonging to the actor and one to the defendant, it is best run as a pair of questions about two different people.
Students most often lose this issue in one of two ways. They find an innocent actor and stop, forgetting that the defendant's own mental state must still satisfy the offense. Or they find a defendant with a bad purpose and apply the route even though the actor knew exactly what was happening. Each error skips one of the two questions, and each question is decided by a different person's state of mind.
Accountability Imposed by Other Law
The second gateway in § 2.06(2) looks for the source of accountability in enacted text. A person is legally accountable for another's conduct when "he is made accountable for the conduct of such other person by the Code or by the law defining the offense."20 The inquiry therefore has nothing to do with what the defendant said or did to the actor. The question is whether some provision, either elsewhere in the Code or in the statute that defines the offense charged, assigns one person's conduct to another. When such a provision exists, accountability follows its terms, and no separate showing that the defendant is an accomplice is needed.
The Code itself supplies an example in § 2.07. It allows a corporation to be convicted when the offense is a violation, or is defined by a statute outside the Code that plainly shows a legislative purpose to reach corporations, and an agent acting on the corporation's behalf within the scope of office or employment performs the conduct.21 That provision attributes the agent's conduct to the corporation by written rule, which is the mechanism this gateway describes. How far corporate liability extends is a subject of its own. Here § 2.07 matters only because it shows where the attribution comes from: a legislative text.
The gateway is confined to enacted text because holding one person criminally answerable for another's act departs from the premise that blame follows a person's own conduct and culpability. A legislature can weigh, offense by offense, whether enforcement needs justify that departure, for instance where the person who controls a business is best placed to prevent violations, and it can announce the rule in advance so that those affected know when a relationship carries criminal exposure. If judges could infer attribution from a relationship alone, the same inference would reach every employer, parent, or landlord across every offense, and a person who neither acted, aided, nor intended anything could be convicted. Employment alone therefore supplies nothing under (2)(b), and without a provision the owner's exposure depends on whether the facts satisfy another route.
The two versions differ in a single fact, the presence of an attribution provision, and that fact alone decides whether this gateway opens.22 On an exam stem, the move is to look for statutory text that assigns the actor's conduct to the defendant. A stem that describes only an employment or similar relationship has not supplied that text, so the analysis leaves (2)(b) and asks whether the defendant caused an innocent agent to act or became an accomplice.
The Accomplice Route
The third gateway in § 2.06(2) is the shortest to state and the one that carries most real prosecutions. A person is accountable for another's conduct when "he is an accomplice of such other person in the commission of the offense."24 The first two gateways cover special situations: an innocent or irresponsible actor used as an instrument, and a provision that attributes conduct by its own text. This one covers the ordinary case in which two or more people deliberately take part in a crime, one performing the conduct and another helping. That is why accomplice liability is the basis for accountability for another's conduct in most cases.25
The Code reaches this result by discarding the common-law sorting of participants into principals in the first and second degree and accessories before the fact. It treats every participant as an equal except one who becomes involved only after the crime, and it handles help given afterward through a separate offense.26 Dropping the labels spares a court from deciding, for example, whether a lookout stood close enough to the scene to count as a principal. The question becomes a single one: is the defendant an accomplice of the person who acted? Because the route is tied to participation in the offense, a person whose only contribution comes after the crime is complete is outside (2)(c).
Accountability under (2)(c) makes the accomplice guilty of the substantive offense itself, not of some lesser or separate crime of assisting.27 The reason lies in where the harm came from. A robbery that succeeds is the product of a joint effort, and the person who devised and equipped it wanted exactly that harm. If the planner were convicted only of a lesser derivative offense, the planner would be punished for less than the crime he set out to bring about, and the system would reward whoever arranged for someone else to do the dangerous part. Attributing the actor's conduct to the accomplice closes that gap. The offense is completed by one participant's conduct together with another's purpose and help, and the offense is charged against both.
Equal guilt of the offense does not require equal punishment. The Code measures each participant by his own culpability, so an accomplice is graded according to the conduct that was committed together with the accomplice's own mental state, and the Code readily allows different punishment for the person who acted and the person who helped.28 The Code's murder sentencing provision shows the idea at work: among the mitigating circumstances it lists is that the defendant was an accomplice whose participation in the homicidal act was relatively minor.29 The accomplice is therefore convicted of the offense itself, and whatever distinguishes his culpability from the principal's is taken into account in the grade and the sentence.
What separates Alvarez from Reyes is a purpose to promote the robbery joined to conduct that serves it. Proximity to the wrongdoer supplies neither element, so a stem that places the defendant near the crime has not yet established an accomplice. Subsection (2)(c) itself says only that an accomplice is accountable; it does not say who an accomplice is. That question is answered by the separate definition in subsection (3), which has a mental-state element and a conduct element, and the next section begins with the mental-state element, the requirement of purpose.