Model Penal Code Attempt: Elements, Standards, and Defenses

Criminal liability does not always require a completed offense. Under the Model Penal Code attempt doctrine, conduct may be punishable when it has moved beyond preparation and strongly corroborates a criminal purpose.

Model Penal Code attempt liability is governed principally by Section 5.01, which defines attempt, addresses substantial steps, and recognizes limited defenses such as renunciation. Its approach differs significantly from traditional common-law proximity tests.

Why Model Penal Code Attempt Liability Begins Before Completion

The Model Penal Code imposes attempt liability before a planned offense is completed because criminal law may intervene when an actor has moved beyond private intent and begun conduct demonstrating a real criminal purpose.

Waiting until every element of the completed crime occurs can leave potential victims and the public exposed to preventable harm. Attempt law addresses conduct that creates a sufficiently concrete danger, even if the intended result never happens.

Under the Model Penal Code attempt approach, liability is not based on bad thoughts alone. The prosecution must establish the required culpability and conduct that strongly corroborates the actor’s criminal purpose.

This framework distinguishes punishable efforts to commit an offense from remote planning or ambiguous preparation. It seeks to permit early intervention while preserving limits that protect individuals from punishment for mere suspicion or unlawful intent without meaningful action.

The Statutory Framework Under MPC Section 5.01

MPC Section 5.01 defines criminal attempt and establishes liability before the intended offense is completed. It applies when an actor has the required culpability and engages in conduct directed toward committing a specific crime.

The provision recognizes three statutory routes to attempt liability:

• purposely engaging in conduct that would constitute the crime if circumstances were as the actor believed;
• causing a prohibited result without completing all required conduct; or
• taking a substantial step toward commission of the offense.

Under the Model Penal Code attempt framework, the substantial-step route is the principal standard for incomplete crimes. The conduct must strongly corroborate the actor’s criminal purpose, separating punishable execution from remote planning or innocent preparation.

Section 5.01 also addresses attempted crimes involving particular result elements and apparent factual or legal impossibility. Its structure focuses on the defendant’s purpose and conduct as understood at the time, rather than requiring that completion was actually possible.

The Three Forms of Attempt Under the Model Penal Code

MPC Section 5.01 recognizes three distinct forms of criminal attempt. Each addresses conduct that falls short of a completed offense but demonstrates a sufficient connection to the intended crime.

The first form applies when a person purposely engages in conduct that would constitute the offense if the circumstances were as the person believes them to be. For example, firing at an empty bed believed to contain a victim may constitute attempted murder.

The second form covers conduct that would constitute the offense if it produced the result the actor purposely causes or believes will occur without further conduct. A person who administers what he believes is poison, intending death, may be liable even if the substance is harmless.

The third form concerns purposeful conduct constituting a substantial step toward committing the offense. Model Penal Code attempt liability under this form often applies where the crime requires further action, such as approaching a planned burglary site with specialized entry tools.

The Mens Rea Requirement for MPC Attempt

Under MPC Section 5.01, attempt liability generally requires that the defendant act purposely. The actor must have the conscious object to engage in the conduct that would constitute the offense or to cause the prohibited result.

For Model Penal Code attempt, the required mental state depends on the element involved:

• Conduct elements: The defendant must act purposely.
• Result elements: The defendant must purposely seek to cause the criminal result.
• Circumstance elements: The Code may permit liability where the actor has the culpability required for those circumstances by the completed offense.

This purpose requirement distinguishes an attempt from conduct that is merely reckless, careless, or suspicious. A person who unknowingly takes steps toward a crime ordinarily lacks the intent needed for attempt liability.

The rule becomes more complex when the completed offense can be committed recklessly or negligently, particularly where a harmful result is involved. The Model Penal Code addresses those issues through its separate treatment of result and circumstance elements, rather than treating every attempt as requiring identical intent for every element.

Purpose, Knowledge, and Result Crimes in Attempt Prosecutions

Under MPC Section 5.01, attempt liability generally requires that the actor act purposely with respect to the conduct or result that would constitute the completed offense. A person must have a conscious objective to engage in the prohibited conduct or cause the prohibited result.

For circumstance elements, however, purpose is not always required. Model Penal Code attempt liability may exist where the defendant acts with the culpability otherwise required for those circumstances, including knowledge when the completed offense requires knowledge.

Result crimes create a narrower question. An attempted killing ordinarily requires a purpose to cause death; knowingly engaging in dangerous conduct, without that purpose, does not by itself establish attempted murder under the Model Penal Code.

The Code does not generally recognize attempts to commit offenses defined solely by recklessness or negligence. Thus, reckless endangerment may be completed through risky conduct, but a defendant cannot ordinarily be charged with attempting reckless endangerment.

Purpose as to Conduct and Circumstances

For an attempted crime under MPC Section 5.01, the actor generally must act purposely with respect to the conduct that would constitute the offense. The person must consciously intend to engage in that prohibited conduct.

Purpose is also required as to circumstances that are material elements of the completed offense. In Model Penal Code attempt analysis, it is not enough that the actor merely suspects or is aware of those circumstances.

For example, an attempted theft prosecution requires proof that the defendant intended to take property and intended that the property belong to another person. A person who deliberately takes an item believing it is abandoned may lack the required purpose regarding ownership.

This requirement narrows attempt liability by linking punishment to a deliberate effort to commit a defined offense. It distinguishes purposeful criminal action from conduct that is accidental, mistaken, or undertaken without an intent to act under the prohibited circumstances.

The Treatment of Result Elements

For result crimes, the Model Penal Code generally requires that the defendant act with the purpose of causing the prohibited result. Thus, an attempted homicide ordinarily requires a conscious objective to cause death.

This approach separates attempted intentional crimes from offenses defined by a lesser mental state. A person who acts knowingly or recklessly may create grave danger, yet may not have the purpose required for attempt liability.

MPC Section 5.01(1)(b) addresses conduct that would cause the result without further action by the actor, but only if the actor believes the result will occur. Liability may arise when the intended result is interrupted by an unforeseen circumstance.

For example, a defendant who administers what they believe is a lethal poison may be guilty of attempted murder even if the substance is harmless. Under Model Penal Code attempt principles, the defendant’s purpose and belief are evaluated based on the circumstances as perceived.

Attempted Crimes Involving Recklessness or Negligence

Under MPC Section 5.01, attempt liability generally requires that the actor act purposely with respect to the conduct or result involved. This requirement creates difficulty when the completed offense is defined by recklessness or negligence.

A person ordinarily cannot be convicted of attempting a purely reckless or negligent result offense merely because they created a risk. Recklessness involves conscious risk-taking, while negligence concerns a failure to perceive a risk; neither mental state necessarily includes a purpose to cause the prohibited result.

The Model Penal Code attempt rule can still apply where the defendant purposely engages in conduct that would constitute the offense if the required circumstances existed or the intended result occurred. The focus remains on what the actor intended to do, not merely on dangerous conduct.

For example, someone who deliberately fires into an occupied building may be prosecuted for an intentional attempted injury offense if the evidence shows a purpose to injure. Model Penal Code attempt does not convert every reckless endangerment into an attempt crime.

Understanding the Substantial Step Test

Under MPC Section 5.01, an attempt may be established when a person takes a substantial step toward committing an offense. The conduct must strongly corroborate the actor’s criminal purpose, demonstrating more than a general intention or preliminary planning.

The Model Penal Code attempt standard does not require the defendant to come dangerously close to completing the crime. Instead, it asks whether the conduct has progressed far enough to provide reliable evidence of a firm criminal intent.

Mere preparation ordinarily remains insufficient. For example, forming a plan, obtaining ordinary items, or discussing a possible offense may not establish attempt liability unless the surrounding facts strongly confirm that the conduct was directed toward a particular crime.

Conduct Strongly Corroborative of Criminal Purpose

Under MPC Section 5.01, conduct must strongly corroborate the actor’s criminal purpose before attempt liability attaches. The focus is not merely on what the person intended, but on whether external actions reliably demonstrate that intent.

Conduct is strongly corroborative when it makes the alleged criminal purpose substantially more credible than an innocent explanation. Courts assess the surrounding circumstances, including the nature, timing, and context of the defendant’s acts.

For example, approaching a targeted location with specialized burglary tools may corroborate an intent to commit burglary, while merely owning such tools ordinarily does not. The conduct must move beyond ambiguous preparation toward execution of the planned offense.

This requirement helps limit Model Penal Code attempt liability to conduct that presents a real and objectively verifiable danger. It also protects individuals from punishment based solely on criminal thoughts, preliminary discussions, or equivocal acts.

How the Test Differs From Mere Preparation

Mere preparation consists of arranging the means or conditions for a possible crime without conduct that sufficiently demonstrates a firm commitment to carry it out. Buying ordinary tools or considering a plan will not ordinarily establish attempt liability.

Under the Model Penal Code attempt standard, the defendant must take a substantial step that strongly corroborates criminal purpose. The inquiry focuses on what the conduct objectively reveals, not solely on the defendant’s unexpressed intent.

Conduct that may remain preparatory includes:

• Acquiring items with legitimate as well as unlawful uses
• Gathering general information about a potential target
• Making plans without moving toward execution
• Traveling without conduct directly tied to the intended offense

The line is crossed when actions move beyond remote planning and reliably indicate that the offense is underway. For example, approaching a chosen victim with a weapon or entering a location to commit a planned crime may satisfy the substantial-step requirement.

Examples of Substantial Steps Listed in MPC Section 5.01

MPC Section 5.01(2) identifies conduct that may qualify as a substantial step when it strongly corroborates the actor’s criminal purpose. The list is illustrative rather than exhaustive, and liability depends on the surrounding facts.

Examples include lying in wait, searching for, or following a contemplated victim; enticing or seeking to entice the victim to a planned crime location; and reconnoitering the place where the offense is intended to occur.

The provision also covers unlawful entry into a structure, vehicle, or enclosure where the crime will be committed. Possessing materials specially designed for unlawful use, or materials that serve no lawful purpose under the circumstances, may likewise support a Model Penal Code attempt charge.

An actor may also take a substantial step by possessing, collecting, or fabricating materials near the crime scene, or by soliciting an innocent agent to engage in conduct constituting an element of the planned offense.

Lying in Wait, Searching, or Enticing a Victim

Under MPC Section 5.01(2), lying in wait, searching for, or following a contemplated victim may constitute a substantial step toward committing an offense. The conduct must strongly corroborate the actor’s criminal purpose.

Lying in wait involves positioning oneself to intercept or attack an intended victim. Searching for or following that person can similarly demonstrate movement beyond planning, particularly when paired with other incriminating circumstances.

Enticing or seeking to entice a contemplated victim to go to a particular location is also listed as potentially sufficient conduct. For example, luring a person to an isolated place to carry out a planned assault may support attempt liability.

Under the Model Penal Code attempt standard, these acts are not automatically criminal attempts in every case. Courts must evaluate the surrounding facts, including the actor’s intent, preparations, and whether the conduct clearly confirms a purpose to commit the underlying offense.

Reconnoitering the Place of the Crime

Reconnoitering occurs when a person examines or surveys a proposed crime location to facilitate the offense. Under MPC Section 5.01(2), this conduct may qualify as a substantial step when it strongly corroborates the actor’s criminal purpose.

Relevant reconnaissance may include activities such as:

• Visiting a building to identify entrances, exits, cameras, or security routines;
• Observing a victim’s home, workplace, or travel patterns;
• Mapping escape routes or identifying times when the location is less occupied.

Mere presence near a location is not enough. The surrounding facts must indicate that the observation was connected to a planned criminal offense rather than an innocent purpose, such as ordinary travel, curiosity, or lawful business.

For Model Penal Code attempt liability, reconnaissance becomes significant when its timing, manner, and connection to other conduct demonstrate a firm intent to commit the targeted crime.

Possessing Materials Designed for Criminal Use

Under MPC Section 5.01(2)(f), possession of materials may constitute a substantial step when the items are specially designed for unlawful use or can serve no lawful purpose under the circumstances.

The focus is not mere ownership of ordinary objects. Prosecutors must show that the materials, their design, and the surrounding facts strongly corroborate the actor’s purpose to commit a particular offense.

For example, possession of a forged key made to enter a specified building, or a device adapted to defeat a particular alarm system, may support attempt liability. By contrast, possessing common tools ordinarily used for lawful work generally requires stronger contextual evidence.

This Model Penal Code attempt provision permits intervention before the intended crime is completed, while preserving a boundary between demonstrable criminal purpose and ambiguous preparation.

Soliciting an Innocent Agent to Commit the Offense

Under MPC Section 5.01(2)(g), a person may take a substantial step toward an offense by soliciting an innocent or irresponsible agent to engage in conduct that would establish an element of the crime.

An innocent agent is someone who lacks the required criminal intent, capacity, or awareness of the unlawful objective. The person directing the conduct may still be liable even though the agent cannot be convicted of the completed offense.

Examples may include:

• Asking an unwitting delivery worker to transport a package containing contraband;
• Directing a child or legally irresponsible person to carry out prohibited conduct;
• Causing another person to perform an act through deception about its criminal significance.

For Model Penal Code attempt purposes, the solicitation must strongly corroborate the actor’s criminal purpose. A vague request or preliminary discussion is not enough; the request must be connected to conduct that would advance the intended offense.

Impossibility and Model Penal Code Attempt Liability

Under MPC Section 5.01, factual or legal impossibility generally does not bar attempt liability. The controlling question is whether the defendant’s conduct would constitute a crime if the circumstances were as the defendant believed them to be.

Factual impossibility arises when an intended crime cannot be completed because of an unknown fact. For example, a person who fires into an empty bed, believing the victim is present, may be liable for attempted homicide.

Legal impossibility traditionally concerned conduct that the defendant believed was illegal but was not actually criminal. The Model Penal Code attempt approach substantially rejects this defense when the actor’s assumed circumstances would make the conduct an offense.

Model Penal Code attempt liability therefore focuses on the actor’s criminal purpose and substantial step, rather than on accidental failures or misunderstandings that prevent completion.

Renunciation as a Defense to Attempt

Under MPC Section 5.01(4), a person who has committed an attempt may avoid liability through renunciation. The defense recognizes that abandonment can prevent the threatened offense, but only when the withdrawal meets strict statutory conditions.

Renunciation must be voluntary and complete. It is not voluntary if motivated by a greater likelihood of detection, apprehension, or a decision to postpone the crime for a more favorable opportunity. It is not complete if the actor merely substitutes another intended victim or criminal objective.

The actor must abandon the effort to commit the offense or otherwise prevent its commission under circumstances showing a complete and voluntary renunciation of criminal purpose. In some situations, affirmative steps to stop the crime may be required.

For Model Penal Code attempt liability, renunciation is an affirmative defense. The defendant bears the burden of raising and establishing the defense under the applicable procedural rules, while the prosecution may challenge whether the abandonment was truly voluntary and complete.

Grading and Punishment of Model Penal Code Attempt

Under MPC Section 5.05(1), an attempt is generally graded at the same level as the completed offense. Thus, a person who takes a substantial step toward a third-degree felony may ordinarily be punished as for a third-degree felony.

This approach reflects the Model Penal Code attempt rule that serious, purposefully undertaken criminal conduct can warrant liability even when the intended harm does not occur. The grading ordinarily follows the offense attempted, not the degree of success achieved.

Two important exceptions apply. An attempt to commit a first-degree felony is generally graded as a second-degree felony, while an attempt to commit a capital crime is also graded as a second-degree felony under the Code’s original structure.

The Code separately authorizes reduced punishment in limited circumstances involving renunciation or other provisions applicable to sentencing. Actual penalties depend on the jurisdiction’s enacted version of the Model Penal Code and its current felony-classification statutes.

General Rule for Attempt Grading

Under MPC Section 5.05(1), an attempt is generally graded at the same level as the offense attempted. A person who attempts a third-degree felony, for example, ordinarily faces liability for a third-degree felony.

This approach reflects the Model Penal Code’s view that serious criminal purpose and a substantial step toward completion can warrant punishment comparable to the completed offense. The rule applies even when the intended harm never occurs.

Model Penal Code attempt grading is tied to the grade of the target offense, rather than to a separate, automatically lesser attempt category. Courts therefore identify the offense the defendant allegedly intended to commit and apply its ordinary grade.

The general rule is subject to specified statutory exceptions for certain highly serious felonies. Those exceptions affect grading, but they do not alter the basic principle that attempts normally carry the same grade as completed offenses.

Exceptions for the Most Serious Felonies

Under MPC Section 5.05(1), an attempt is generally graded the same as the completed offense. The principal exception applies when the completed crime is a felony of the first degree.

In that circumstance, Model Penal Code attempt liability is graded as a felony of the second degree rather than a first-degree felony. This limitation applies even where the actor’s conduct would otherwise support an attempt conviction for the most serious completed offenses.

The rule reflects the Code’s view that an uncompleted offense ordinarily warrants substantial punishment, but not the maximum grade assigned to a completed first-degree felony. It also preserves a meaningful distinction between attempt and consummation.

The exception concerns grading, not whether liability exists. A defendant who purposely takes a substantial step strongly corroborative of criminal purpose may still be convicted; the provision limits the offense level and corresponding punishment.

Attempt, Solicitation, and Conspiracy Under the Model Penal Code

The Model Penal Code treats attempt, solicitation, and conspiracy as separate inchoate offenses, each addressing criminal conduct before the intended crime is completed. They differ chiefly in the defendant’s level of action and involvement with others.

Attempt requires a purposeful act constituting a substantial step toward committing the target offense. Under the Model Penal Code attempt standard, conduct must strongly corroborate the actor’s criminal purpose rather than remain mere preparation.

Solicitation occurs when a person commands, encourages, or requests another person to commit a crime, or to aid its commission, with the purpose of promoting or facilitating that crime. The offense is complete upon the communication.

Conspiracy involves an agreement between two or more persons to commit, attempt, solicit, or aid criminal conduct, coupled with the required purpose. For most offenses, the Code also requires an overt act in furtherance of the agreement.

How the Model Penal Code Attempt Standard Differs From Common Law

Common law traditionally required conduct that came dangerously close to completing the substantive offense. Courts applied varying tests, including dangerous proximity, physical proximity, and unequivocality, producing inconsistent outcomes across jurisdictions.

The Model Penal Code attempt standard replaces these narrower approaches with the substantial-step test. Liability may arise when conduct strongly corroborates the actor’s criminal purpose, even if completion remains relatively remote.

Key distinctions include:

• Common law often emphasized how near the defendant came to the completed crime.
• The Model Penal Code emphasizes whether the defendant’s actions reliably demonstrate criminal intent.
• MPC Section 5.01 provides illustrative substantial steps, promoting greater consistency in application.

The Model Penal Code also adopts a broader approach to factual and legal impossibility. An actor may be guilty of attempt when the conduct would constitute a crime if circumstances were as the actor believed them to be.

Applying the Model Penal Code Attempt Test to Criminal Conduct

Courts applying the Model Penal Code attempt test examine the actor’s intended offense, the mental state required for each element, and the conduct completed before intervention or failure. Liability does not depend on the crime’s completion.

The analysis asks whether the defendant acted with the required purpose and took a substantial step toward committing the offense. That step must strongly corroborate the firmness of the criminal purpose, not merely suggest suspicion.

For example, a person who surveys a bank, obtains a weapon, and approaches the entrance at the planned time may satisfy the test when those acts strongly support an intended robbery. Lawful or ambiguous preparation alone may not suffice.

The Model Penal Code attempt inquiry is fact-specific. Courts assess the surrounding circumstances, the defendant’s statements and actions, and whether the conduct reliably demonstrates a committed effort to commit the target crime.