Accomplice and accessory liability

Timing and Purpose: Sorting Assistance by the Moment It Occurs

Accomplice and accessory liability turn on when a person acts, what the person does, and the mental state accompanying that act. A fact pattern is testing these doctrines when it mentions a lookout, getaway driver, supplied weapon or key, encouragement, a promise of payment, concealment of evidence, hiding the offender, or a person who learns of the crime only afterward.

Begin by identifying when the target crime was completed under the governing provision. Assistance before or during completion belongs to accomplice analysis; assistance after completion may constitute the separate offense of being an accessory after the fact. Then ask whether the person acted purposefully to facilitate the crime or, for postcrime conduct, knowingly and purposefully to protect the offender.

Pattern	Timing of assistance	Presence during crime	Required mental state	Usual classification
Modern accomplice	Before or during	Present or absent	Purpose to facilitate or required statutory culpability	Liable for the target offense under the statute
Accessory before the fact under older labels	Before	Absent	Intent to aid or encourage the crime	Usually treated as accomplice conduct today
Principal in the second degree under older labels	During	Present and aiding or encouraging	Intent to aid or encourage the crime	Usually treated as accomplice conduct today
Accessory after the fact	After the felony is completed	Presence at the original crime is irrelevant	Knowledge of the felony and purpose to help avoid arrest, trial, conviction, or punishment	Separate offense
Mere bystander	Before or during	Present or absent	No purposeful aid or encouragement	No accomplice liability on these facts

“Accomplice” is often the modern umbrella term. Under older common-law terminology, a person who intentionally assisted beforehand but was absent from the scene was an accessory before the fact, while a person present and intentionally assisting was a principal in the second degree. A statute may merge those labels, so the supplied provision controls. Do not let the word “accessory” obscure the timing distinction.

Mere knowledge, friendship, presence, or failure to intervene ordinarily does not establish accomplice liability. A person must have aided, encouraged, solicited, agreed to aid, or attempted to aid in the manner the governing provision requires. The assistance need not be the but-for cause of the crime, and the principal need not know that assistance was provided unless the statute says otherwise. Conversely, postcrime help does not retroactively make the person an accomplice to the completed crime.

One person may occupy both categories through different acts. For example, supplying a key before a burglary may produce accomplice liability, while destroying evidence afterward may separately produce accessory-after-the-fact liability. This topic is not starred: legal resources may be supplied when it is tested, and where they are not, you need only demonstrate recognition that the topic is at issue. You are not required to hold this topic cold because resources may be supplied; because you will not know whether they are coming, the floor is the vocabulary and sequence that let you identify the correct provision quickly.

The Floor and the Supplied Rule: A Fast Classification Method

The floor to hold in memory is concrete: accomplice, accessory before the fact, principal in the second degree, accessory after the fact, completion, aid or encouragement, purpose to facilitate, knowledge, presence, and separate offense. Also hold the order of analysis: locate the governing rule, determine when the crime was complete, classify the assistance as before/during or after, test the applicable mental state, and then apply any statutory exception.

What you do not have to hold is the exact wording of every element, the list of permitted forms of assistance, exception language, grading provisions, or subsection numbers. Those contents belong in the supplied provision. What you must recognize without delay is which provision to reach for: the accomplice provision for purposeful assistance before or during the offense, and the accessory-after provision for knowing, purposeful assistance after completion.

Run the facts through this sequence. If several acts occurred, analyze each act separately; do not allow a later act to erase an earlier classification.

Loading diagram…

A supplied rule should be read for operative language, not for its label. Find the timing words, mental-state verbs, conduct verbs, consequence, and exceptions. Then map each fact to one phrase. For example, “before or during,” “purpose of promoting,” and “aids, agrees to aid, or attempts to aid” are separate requirements; satisfying one does not automatically satisfy the others.

For practice, assume the following is the entire supplied provision:

Accomplice liability. A person is an accomplice in the commission of an offense if, before or during its commission, the person, with the purpose of promoting or facilitating the offense, solicits another to commit it or aids, agrees to aid, or attempts to aid another in planning or committing it. An accomplice is liable for the offense as if the accomplice were the principal.

A person is not an accomplice under this provision if, before the offense is committed, the person wholly terminates the assistance and either makes a reasonable effort to prevent the offense or gives timely warning to law enforcement.

Accessory after the offense. A person commits accessory after the offense if, knowing that another has committed a felony, the person, with the purpose of helping that person avoid arrest, trial, conviction, or punishment, provides assistance after the felony is completed. This offense does not require the person to have assisted before or during the felony.

Noor gave Lee a detailed floor plan of a jewelry store two days before Lee burglarized it. Noor gave the plan with the purpose of helping Lee carry out the burglary, but Noor did not go to the store. After the burglary was completed, Noor hid Lee’s jacket so that police would not identify or arrest Lee. Noor knew that Lee had committed the burglary.

Practice

Under the supplied provision, what liability, if any, does Noor have?

Recurring errors:

Calling a person who supplied a getaway map before the crime an accessory after the fact confuses precrime assistance with postcompletion assistance.
Treating a person’s presence outside the store as enough for accomplice liability ignores the separate requirement of purposeful aid or encouragement.
Treating concealment of the offender’s jacket after completion as accomplice conduct to the burglary ignores the accessory-after provision’s separate offense.
Assuming the labels are mutually exclusive misses that purposeful precrime aid and purposeful postcrime shielding can create two liabilities.
Replacing the supplied statute with an older common-law label risks overlooking the statute’s express timing and exception language.

Three Role-Classifications: Fast Calls on Timing and Purpose

Practice

Mira agreed to help rob a store, stood outside during the robbery, and signaled when police approached. She never entered the store or handled the money. Under the modern accomplice terminology used in the chapter, what is Mira’s status?

After a felony was completed, Luis learned that his friend had committed it and hid the friend’s firearm to help the friend avoid arrest. Luis had provided no assistance before or during the felony. What is Luis’s most fitting classification?

Under a statute treating purposeful aid before or during an offense as accomplice conduct, Sera supplied a burglary key before the crime, stayed away during it, and later destroyed security footage to help the burglar avoid arrest. What liability does Sera face?

High-Yield Points - ⚡ Biggest Takeaways

Classify the act by completion first: before or during points to accomplice analysis; after points to accessory-after analysis. Purposeful assistance matters for accomplice liability; knowledge alone and presence alone do not. Precrime aid and postcrime shielding can create two distinct liabilities.

Unlock the full lesson and continue reading

Signup to continue reading this lesson and unlimited access questions, flashcards, AI notes, and more

Scan to download app

UNLOCK FREE ACCESS

Practice Questions: Accomplice and accessory liability

1. During an argument, a man intentionally stabbed another person in the abdomen, intending to kill him. The victim was taken to a hospital, where a physician negligently failed to diagnose internal bleeding that ordinarily would have been detected and treated. The victim died from the combined effects of the wound and the untreated bleeding. A medical expert concluded that the victim would have survived with competent treatment, but the physician's negligence was not extraordinary or intentionally harmful. The prosecutor is considering a murder charge against the attacker. Which of the following is the strongest conclusion regarding causation?

A. The original attacker is liable for murder because the stabbing remained an actual and proximate cause of the victim's death.
B. The original attacker is liable only for attempted murder because negligent medical treatment necessarily breaks the causal chain.
C. The original attacker is liable only for manslaughter because the physician, rather than the attacker, performed the act immediately preceding death.
D. The original attacker is not liable for homicide unless the prosecution proves that the physician's treatment complied with professional standards.

Show answer

Answer: A. The original attacker is liable for murder because the stabbing remained an actual and proximate cause of the victim's death.

The original attacker is liable for murder because the stabbing remained an actual and proximate cause of the victim's death. - The stabbing was an actual cause of death: without the wound, there would have been no wound-related bleeding to leave untreated. - Ordinary negligent treatment of the wound does not supersede the stabbing as a cause, and the attacker acted with intent to kill. The original attacker is liable only for attempted murder because negligent medical treatment necessarily breaks the causal chain. - Negligent treatment does not necessarily break the causal chain when the original wound remains a cause of death. - The expert’s view that competent treatment would have saved the victim does not erase the stabbing’s role in the death that occurred. The original attacker is liable only for manslaughter because the physician, rather than the attacker, performed the act immediately preceding death. - Causation does not depend on who acted last; the wound and untreated bleeding combined to cause death. - The attacker’s intent to kill supports murder rather than reducing the offense to manslaughter because of the physician’s later negligence. The original attacker is not liable for homicide unless the prosecution proves that the physician's treatment complied with professional standards. - The prosecution must prove the stabbing actually and proximately caused death, not that the physician provided competent care. - The physician’s negligent failure to diagnose bleeding does not preclude homicide liability when the stabbing remained a cause of death.

3. Using only the supplied file and legal resources, prepare an advisory client letter evaluating the prosecution's murder theory, Jordan's self-defense argument, the causation issue, and the proposed manslaughter resolution. Explain the principal risks in plain language and recommend a negotiation position without predicting a certain verdict.

4. Using only the supplied file and legal resources, prepare an advisory letter explaining which charges the prosecution may retry. Address when jeopardy attached, the effect of the defense-requested mistrial, whether the prosecutor's conduct triggers the intent-to-provoke limitation, and the consequences of the firearm acquittal and robbery deadlock. Give realistic advice about the strength of a motion to bar retrial and identify the most useful remaining investigation concerning the prosecutor's intent. Do not use outside law.

8. Police arrested a driver on probable cause for leaving the scene of a collision. At the station, an officer placed the driver in an interview room and said, without giving warnings, “The damaged car contained a child’s backpack.” The driver remained silent. Twenty minutes later, while transporting the driver to a detention facility, two officers discussed between themselves that the injured child might die without information about what happened. The officers knew the driver could hear them but had not planned the conversation to obtain a response. The driver interrupted and said, “I was looking at my phone when I hit the car.” The prosecution seeks to use the statement in its case-in-chief. The driver has not alleged coercion. Is the court likely to suppress the statement?

A. Yes, because any statement made after an unwarned custodial remark is excluded from the prosecution’s case-in-chief.
B. Yes, because the officers should have known that discussing the injured child was reasonably likely to elicit an incriminating response.
C. No, because the officers’ conversation was not interrogation and the driver volunteered the statement.
D. No, because warnings are required only after formal criminal charges have been filed.

Show answer

Answer: C. No, because the officers’ conversation was not interrogation and the driver volunteered the statement.

No, because the officers’ conversation was not interrogation and the driver volunteered the statement. - Miranda bars unwarned statements made during custodial interrogation, including its functional equivalent, but not volunteered statements. - As in Rhode Island v. Innis, the officers spoke to each other rather than questioning the driver, and the facts do not show they should have known their conversation was reasonably likely to elicit his interruption. Yes, because any statement made after an unwarned custodial remark is excluded from the prosecution’s case-in-chief. - The officer’s earlier remark about the child’s backpack drew no response from the driver. - That remark does not automatically exclude a later, volunteered statement; the driver has not alleged coercion. Yes, because the officers should have known that discussing the injured child was reasonably likely to elicit an incriminating response. - The reasonably likely to elicit standard can apply even when officers speak to each other within a suspect’s hearing. - Here, their unplanned conversation, without a stated reason to expect the driver to respond, does not establish the functional equivalent of questioning. No, because warnings are required only after formal criminal charges have been filed. - Miranda warnings are required before custodial interrogation, regardless of whether formal charges have been filed. - The statement is admissible because it was volunteered, not because the driver had yet to be charged.

Flashcards: Accomplice and accessory liability

1. What crimes may an accomplice be liable for beyond the crime he intended to facilitate?

Show answer

Under the majority/natural-and-probable-consequences approach, an accomplice is liable for the target crime and for other crimes committed by the principal that are reasonably foreseeable consequences of the aided conduct. The minority approach limits liability to crimes the accomplice intended to facilitate.

2. Under the supplied rule, what is the primary distinction between accomplice liability and accessory after the offense, regarding timing and mental state?

Show answer

Accomplice liability applies to purposeful assistance given before or during the offense. Accessory after the offense applies to knowing, purposeful assistance given after completion of a felony, with the purpose of helping the offender avoid legal consequences.

3. What is the majority rule on factual versus legal impossibility as a defense to attempt?

Show answer

Factual impossibility is generally not a defense: a person may be guilty when the intended crime could not be completed because of circumstances unknown to the person. Legal impossibility is a defense when the intended conduct, even if completed as intended, would not be criminal.

4. Under the majority rule, when can abandonment or renunciation defeat attempt liability?

Show answer

At common law, abandonment after the defendant has completed the acts required for attempt is generally no defense. Under the modern majority of statutes, abandonment may be a defense only if the defendant completely and voluntarily renounces the criminal purpose before the crime is completed.

5. What is the Pinkerton rule for a conspirator’s liability for another conspirator’s substantive crime?

Show answer

Under the majority rule, a conspirator is liable for a substantive offense committed by a co-conspirator if it was committed in furtherance of the conspiracy and was a reasonably foreseeable consequence of it. The conspirator need not personally participate in or know of the specific offense.

6. What are the elements of being an accessory after the fact?

Show answer

An accessory after the fact, a separate offense from the underlying crime, knowingly assists the offender after the crime is completed with the purpose of helping the offender avoid arrest, trial, conviction, or punishment. The accessory must know that the offender committed a felony or, under some statutes, another specified serious offense.

7. What are the elements of accomplice liability under the majority rule?

Show answer

The defendant must intentionally aid, encourage, or facilitate the principal’s crime, with intent to assist and intent that the crime be committed. Mere presence, knowledge, or failure to intervene generally is not enough.

8. What is the majority rule for liability for an unsuccessful solicitation?

Show answer

Solicitation requires asking, encouraging, or commanding another person to commit a crime, with intent that the person commit it. The crime is complete when the request is made, even if the other person refuses.

Accomplice and accessory liability

On this page

Timing and Purpose: Sorting Assistance by the Moment It Occurs

The Floor and the Supplied Rule: A Fast Classification Method

Three Role-Classifications: Fast Calls on Timing and Purpose

High-Yield Points - ⚡ Biggest Takeaways

Unlock the full lesson and continue reading

Practice Questions: Accomplice and accessory liability

Flashcards: Accomplice and accessory liability

Everything you need for Bar Exam prep