Inchoate Crimes: General Principles

Inchoate crimes occupy a unique and critical space in criminal law, punishing dangerous conduct that falls short of completing an intended harm. These doctrines—attempt, solicitation, and conspiracy—allow the legal system to intervene before a substantive offense (like murder or robbery) is fully carried out, balancing the need for public safety against the principle that thoughts alone are not criminal. Understanding these general principles is essential for grasping how the law defines criminality, assesses blameworthiness, and seeks to prevent harm at its earliest stages.

The Policy Rationale for Punishing Preparatory Conduct

The fundamental question is: why punish conduct that has not yet resulted in the intended harm? The law recognizes several compelling policy justifications. First, and most importantly, is crime prevention. By authorizing law enforcement intervention at the attempt or planning stage, the law aims to stop criminal harm before it occurs, protecting potential victims and preserving public order. Second, these doctrines punish and condemn a culpable mental state. An individual who takes concrete steps toward committing a serious crime demonstrates a dangerous disposition and a firm intent to break the law, which society has an interest in condemning and correcting. Third, punishing inchoate acts allows for the gradation of offense seriousness. A completed murder is typically punished more severely than an attempted murder, reflecting both the greater harm caused and the offender’s higher degree of success.

However, the law must draw a line to avoid punishing mere thought or trivial preparation. The core challenge in defining inchoate crimes is establishing a clear actus reus (guilty act) that provides objective evidence of a firm mens rea (guilty mind) and poses a genuine threat to public safety. This balance is struck differently across the specific offenses of attempt, solicitation, and conspiracy.

Attempt: The Substantial Step Toward a Crime

Attempt is the most common inchoate offense, punishing conduct that goes beyond mere preparation and moves directly toward the commission of a crime. The central legal issue is determining the precise point at which preparation becomes attempt. Jurisdictions follow different tests, but the Model Penal Code (MPC) approach is highly influential.

The MPC defines attempt as occurring when a person, acting with the culpability required for the substantive crime, engages in conduct that constitutes a "substantial step" toward its commission. A substantial step must be strongly corroborative of the actor’s criminal purpose. Examples include lying in wait for a victim, unlawfully entering a structure, or possessing specialized tools for the crime. This is a more flexible standard than older common law tests like the "last proximate act" or "dangerous proximity" tests, which required the defendant to be much closer to completing the crime.

A key defense in attempt law is impossibility. Factual impossibility (e.g., shooting at a stump believing it is a person) is generally not a defense because the defendant’s intent and actions were still dangerous. Legal impossibility (e.g., receiving one’s own property believing it is stolen) is a defense, as the completed act, even if done as intended, would not actually be a crime. Under the MPC, however, true legal impossibility is very narrow, focusing on whether the defendant’s beliefs, if true, would constitute a crime.

Solicitation and Conspiracy: The Social Dimension of Inchoate Crimes

While attempt often involves a single actor, solicitation and conspiracy address the social aspects of preparatory crime. Solicitation is the crime of urging, advising, commanding, or encouraging another person to commit a felony or a misdemeanor involving breach of the peace. The crime is complete the moment the solicitation is communicated, even if the person solicited immediately rejects the idea. The mens rea requires an intent that the solicited crime be committed.

Conspiracy is an agreement between two or more persons to commit a criminal act or to achieve a lawful act by unlawful means. Its punishment is justified by the increased danger of group criminality: combinations are more likely to succeed, more difficult for law enforcement to deter, and involve a mutual reinforcement of criminal intent. The actus reus is the agreement itself. Many jurisdictions also require an overt act in furtherance of the conspiracy by any one conspirator, but the act can be minor (like making a phone call or renting a car).

A profound feature of conspiracy law is the Pinkerton rule, derived from common law, which holds each conspirator liable for the foreseeable substantive crimes committed by co-conspirators in furtherance of the conspiracy. This creates a powerful tool for prosecution but is controversially broad. The MPC rejects the Pinkerton doctrine, requiring individual culpability for the commission of substantive offenses.

The Merger Doctrine and Grading of Offenses

The merger doctrine is a key principle governing the relationship between inchoate and substantive crimes. It holds that a lesser included offense "merges" into a greater completed offense upon conviction. However, for inchoate crimes, merger applies unevenly. Solicitation and attempt do merge into the completed crime. You cannot be convicted of both soliciting a murder and the completed murder of the solicited victim; the solicitation charge is absorbed. Similarly, you cannot be convicted of both attempt and the completed offense.

Conspiracy, critically, does not merge under traditional common law and federal law. This is due to the distinct societal harm of the agreement itself. Therefore, a defendant can be convicted and sentenced for both conspiracy to commit robbery and the completed robbery. This is known as the doctrine of cumulative punishment for conspiracy and the substantive offense.

The grading of inchoate offenses—determining their severity and punishment relative to the target crime—also varies. A general rule is that an inchoate crime is punished less severely than the completed offense. The MPC, for instance, typically grades attempt at the same level as the target crime, except for first-degree felonies (where it is a second-degree felony). Conspiracy is often punished as severely as the target crime itself, reflecting its special dangers. Solicitation is frequently graded one level lower than the target crime.

Common Pitfalls

1. Confusing the Actus Reus for Attempt: A common mistake is believing that mere preparation is enough for an attempt charge. Remember, under the MPC, a "substantial step" strongly corroborative of intent is required. Purchasing legal materials is preparation; using them to build a unique explosive device is a substantial step.
2. Misapplying Impossibility Defenses: Students often confuse factual and legal impossibility. Factual impossibility is not a defense. If you pick an empty pocket, you are guilty of attempted larceny. True legal impossibility is a defense but is very rare under modern statutes like the MPC.
3. Overlooking the Overt Act Requirement in Conspiracy: Not all conspiracies require an overt act. While federal law and the MPC require one (except for very serious crimes), some state common law jurisdictions hold that the agreement alone is sufficient. Always identify the governing law.
4. Assuming All Inchoate Crimes Merge: The non-merger of conspiracy is a major exception. Failing to recognize this can lead to incorrect conclusions about potential charges and sentencing. A conspirator can face separate, consecutive sentences for the agreement and the completed crime.

Summary

• Inchoate crimes—attempt, solicitation, and conspiracy—punish conduct aimed at, but falling short of, completing a substantive criminal offense, primarily to prevent harm and condemn dangerous intent.
• Attempt requires a "substantial step" strongly corroborative of criminal purpose, moving beyond mere preparation. Factual impossibility is generally not a defense.
• Solicitation is complete upon the communication of an intent that another person commit a crime, regardless of the other person’s response.
• Conspiracy is an agreement to commit a crime, often requiring an overt act. Its unique dangers justify the Pinkerton rule of vicarious liability and the doctrine of cumulative punishment, as it does not merge with the completed crime.
• Understanding the merger doctrine and grading principles is essential for accurately assessing liability and potential punishment in scenarios involving incomplete criminal plans.