Introduction

Among the most distinctive features of Philippine criminal law is the treatment of the impossible crime. It is a concept that punishes a person who acts with criminal intent and begins the execution of a crime against persons or property, yet the crime cannot actually be accomplished either because the means employed are inherently inadequate or because the intended act is impossible to complete. It is one of the clearest illustrations of a central idea in penal law: the State may punish not only completed wrongs, but, in limited cases, dangerous criminal intent manifested in overt acts.

In Philippine law, the impossible crime is expressly recognized under the Revised Penal Code. It occupies a peculiar position. It is not a consummated felony, because no felony is actually produced. It is not merely an attempted or frustrated felony in the ordinary sense, because completion is impossible from the start or under the circumstances. It is also not simply a bad thought or evil intention, because the law never punishes criminal thoughts alone. What the law punishes is the combination of criminal intent plus overt acts tending toward the commission of a crime, even though the intended result is legally or factually unattainable.

This article discusses the concept in full: its legal basis, rationale, requisites, kinds, distinctions from other stages of execution, illustrations, effects of mistake, relation to other doctrines, penalties, and practical treatment in Philippine criminal law.

Statutory Basis

The impossible crime is governed by Article 4, paragraph 2 of the Revised Penal Code, which provides in substance that criminal liability shall be incurred by any person performing an act which would be an offense against persons or property, were it not for the inherent impossibility of its accomplishment or on account of the employment of inadequate or ineffectual means.

This provision is exceptional. It does not speak of a completed offense. Instead, it creates liability even when:

the intended felony cannot be accomplished at all, or
the means used are so inadequate or ineffectual that the result cannot be produced.

The law therefore addresses cases where the actor’s conduct reveals a criminal disposition and a direct movement toward a felony against persons or property, but where external reality prevents the crime from maturing into an actual punishable offense of the kind intended.

Basic Concept

An impossible crime exists when a person, with intent to commit a crime against persons or property, performs overt acts toward its commission, but the crime is not produced because:

the act is inherently impossible to accomplish, or
the means employed are inadequate or ineffectual.

The classic examples are familiar:

A person shoots at another who is already dead, believing the victim to be alive.
A person puts poison in a drink, but the substance used is actually harmless and incapable of causing death.
A person tries to steal from a pocket or drawer that is empty, under circumstances recognized in Philippine law as giving rise to impossible crime.

These examples all share one feature: the actor intended to commit a crime, and did acts in direct execution of that intent, but the felony could not be realized as intended.

Rationale of the Doctrine

The impossible crime doctrine rests on several policy considerations.

1. Punishment of criminal perversity

The law recognizes that a person who clearly intends to commit murder, homicide, physical injuries, theft, robbery, or another crime against persons or property, and actually begins to execute that intent, manifests a degree of social danger. Even if the crime fails for reasons unknown to the offender, the law does not allow the actor to walk away entirely free from liability.

2. Protection of society from dangerous intent carried into action

The law does not punish mere intent, but when intent is translated into overt external acts, it becomes punishable under certain conditions. The impossible crime doctrine steps in where the ordinary rules on attempted or frustrated felonies do not fully apply.

3. Gap-filling function in criminal law

Without the doctrine, certain morally blameworthy conduct would escape punishment simply because factual or physical circumstances made the intended offense unattainable. Article 4(2) fills that gap.

4. Emphasis on dangerous conduct rather than actual harm alone

Philippine penal law, while fundamentally anchored on harm and legal injury, also takes account of acts indicating a concrete move toward the infliction of harm. Impossible crime is an example of that preventive and retributive approach.

Essential Requisites of an Impossible Crime

For an impossible crime to exist, the following elements must generally concur:

1. The act performed would be an offense against persons or property

The intended offense must fall under crimes against persons or against property.

This is crucial. The doctrine does not ordinarily apply where the intended offense is, for example, a crime against chastity, public order, honor, or national security. The statutory language is specific: it covers acts that would be offenses against persons or property.

Examples:

Intended killing: offense against persons.
Intended physical injuries: offense against persons.
Intended theft or robbery: offense against property.

2. The act was done with evil intent

There must be criminal intent to commit the offense. The actor must mean to bring about a criminal result.

Without criminal intent, there is no impossible crime. If a person performs an act by accident, negligence, joke, or ignorance without intent to commit a felony, Article 4(2) does not apply.

3. The act must be accompanied by overt acts of execution

There must be a direct, external act showing the commencement of execution of the intended felony. Mere planning, daydreaming, preparation, or internal resolution is not enough.

The offender must cross the line from thought into action.

4. The crime was not accomplished because of inherent impossibility, or because the means employed were inadequate or ineffectual

This is the distinguishing feature.

The failure must be due to:

inherent impossibility of the accomplishment, or
the use of inadequate or ineffectual means.

5. The act does not constitute some other violation of law

This point is often emphasized in discussion. The impossible crime provision should not be used where the act actually amounts to another punishable offense. If another specific felony is committed, liability should generally attach for that actual felony rather than for impossible crime.

For example, if in the course of an “impossible” attempt the offender actually inflicts physical injuries, damages property, illegally possesses a weapon, or violates a special law, those real offenses may control.

Crimes Covered: Only Offenses Against Persons or Property

The wording of Article 4(2) is restrictive. The contemplated act must be one that, if possible, would amount to an offense against persons or property.

Offenses against persons

These include, among others:

Parricide
Murder
Homicide
Infanticide
Abortion
Physical injuries

Offenses against property

These include, among others:

Theft
Robbery
Estafa (as property-related wrong)
Malicious mischief
Arson is sometimes discussed separately in classification, but the statutory phrase is still the guide.

As a rule, if the intended felony is not one against persons or property, impossible crime is not the proper classification.

Inherent Impossibility and Inadequate or Ineffectual Means

These phrases are central and should be carefully distinguished.

A. Inherent impossibility

This refers to a situation where the intended crime cannot be accomplished by its very nature or under the circumstances, even if the actor believes it can.

Examples:

Trying to kill a person who is already dead.
Trying to steal property that does not exist in the place from which it is being taken.
Trying to poison another with a substance that is not poison at all, if the means can never produce death.

The impossibility inheres in the act itself or in the factual situation.

B. Inadequate or ineffectual means

This refers to the use of means that are insufficient or incapable of producing the criminal result.

Examples:

Administering a harmless powder believed to be poison.
Using an unloaded or defective weapon under circumstances where it cannot fire.
Using some method that appears criminally directed but cannot actually cause the intended result.

The focus is not necessarily that the object is impossible, but that the means are too weak, inappropriate, or ineffective to bring about the felony.

Legal Impossibility and Factual Impossibility

In discussions of impossible crime, writers often distinguish legal impossibility and factual impossibility.

1. Legal impossibility

Legal impossibility exists where the intended act, even if completed exactly as the actor desired, would not constitute a crime.

In strict theory, this type is controversial and not always treated identically in all legal systems. In Philippine criminal law, the better and more practical approach is to remain close to Article 4(2): the intended act must be one that would be an offense against persons or property were it not for impossibility or inadequate means.

Thus, if what the person intended would never be criminal at all, there should be no impossible crime, because the law requires an act which would be an offense against persons or property.

2. Factual impossibility

Factual impossibility exists where the intended offense is truly criminal, but it cannot be completed because of some physical or factual circumstance unknown to the offender.

Examples:

Shooting into a bed believing the victim is there, but the victim is absent.
Taking a wallet from a pocket believed to contain money, but it is empty.
Stabbing a corpse believing the victim is alive.

Philippine doctrine and case discussion often revolve around these fact-based impossibilities.

Distinction from Attempted and Frustrated Felonies

This is one of the most important areas in understanding impossible crime.

A. Attempted felony

A felony is attempted when the offender commences the commission of a felony directly by overt acts and does not perform all the acts of execution because of some cause or accident other than spontaneous desistance.

Example:

A person aims and fires at a living victim but misses.
A thief opens a bag to take the contents but is stopped before getting them.

In attempted felony, the crime is possible, but it is interrupted or fails before all acts of execution are completed.

B. Frustrated felony

A felony is frustrated when the offender performs all the acts of execution that would produce the felony as a consequence, but the felony is not produced by reasons independent of the perpetrator’s will.

Example:

A person stabs a victim in a mortal spot, but the victim survives due to timely medical attention.

In frustrated felony, the crime is also possible, and all acts of execution have been performed, but the result does not occur.

C. Impossible crime

In impossible crime, the offense is not actually possible of accomplishment under the circumstances, or the means are inherently inadequate or ineffectual.

Example:

Stabbing a corpse believing it to be alive.
Taking from an empty pocket.
Administering a non-poison believing it to be poison.

Key distinction

Attempted/frustrated felony: the intended felony is objectively possible; it fails because of interruption, resistance, poor aim, medical intervention, or similar causes.
Impossible crime: the intended felony cannot be accomplished from the outset, or the means cannot produce the intended result.

Illustration of the difference

A shoots B, who is alive, but misses. This is attempted homicide or murder, not impossible crime.
A shoots B, thinking B is alive, but B is already dead. This is impossible crime.
A slips sugar into B’s drink, believing it is poison. This may be impossible crime, because the means are ineffectual.
A slips real poison into B’s drink, but B does not drink it because someone intervenes. This is ordinarily attempted murder or attempted homicide, not impossible crime.

Distinction from Mere Preparatory Acts

Not all acts done before a crime are punishable. Philippine criminal law generally punishes felonies only when the offender has begun the commission directly by overt acts.

Thus, buying poison, following a victim, waiting outside a house, or bringing burglary tools may still be merely preparatory unless the offender has crossed into direct execution of the felony.

For impossible crime to exist, the offender must have performed acts that directly tend toward the commission of the intended crime.

Example:

Buying what one believes to be poison is only preparation.
Mixing it into the victim’s drink and causing the victim to ingest it is an overt act of execution.

Distinction from Absolutely Non-Criminal Intentions

Suppose a person thinks an act is wrong but the act is not actually criminal, even if completed as intended. The doctrine of impossible crime does not extend to every mistaken belief about criminality.

Article 4(2) requires that the act performed would be an offense against persons or property were it not for the impossibility or inadequate means. So the intended act must still belong to the category of criminal wrongs recognized by law.

The provision punishes impossible commission of a real crime, not the attempted doing of something merely thought by the offender to be unlawful.

Examples Commonly Used in Philippine Criminal Law

1. Killing a person already dead

A person attacks another, believing the victim to be alive, but the victim is already dead.

This is the classic impossible crime against persons. The actor had intent to kill and performed overt acts, but homicide or murder cannot be committed because the subject is no longer a living person.

Why not attempted homicide or murder?

Because there is no living victim upon whom the felony can legally and physically operate.

Important qualification

If the actor also mutilates the corpse or commits some other offense defined by law, liability for that actual offense may arise.

2. Poisoning with a harmless substance

A person administers a white powder to another believing it to be poison, but it is merely sugar or another harmless substance.

This is the standard example of impossible crime through inadequate or ineffectual means. The criminal intent is present; the means cannot produce death.

Why impossible crime?

Because the method used is incapable of causing the intended felony.

3. Theft from an empty pocket, drawer, or container

A person puts a hand into another’s pocket intending to steal money, but the pocket is empty. Or a person opens a receptacle intending to steal valuables, but nothing is there.

This has been discussed in Philippine criminal law as a form of impossible crime against property.

Why not attempted theft?

The debate exists, but traditional treatment under Philippine doctrine recognizes impossible crime where the object intended to be taken is absent, making accomplishment impossible under the circumstances.

The rationale is that the offender intended theft and performed overt acts, but there was nothing to steal.

4. Shooting at a place where the victim is believed to be

A person fires into a room or bed believing the victim is there, but the victim had already left.

This is often treated as impossible crime if the intended victim was never actually present at the place targeted, since the offense could not hit its object as conceived by the offender.

But one must be careful here. If another person was actually endangered or hit, or if the facts show a real possible target, the case may become attempted homicide, attempted murder, alarms and scandals, illegal discharge, or some other actual offense depending on circumstances.

Requisites Examined in Detail

1. Criminal intent must be specific

The prosecution must show that the accused intended to commit a specific offense against persons or property. It is not enough that the act looked suspicious. The intent must be inferable from conduct, surrounding circumstances, words, weapon used, manner of attack, and target.

Examples of proof of intent

Use of poison suggests intent to kill.
Secret taking from another’s pocket suggests intent to steal.
Aiming a gun at the chest suggests intent to kill or inflict serious injury.

Without proof of intent, conviction for impossible crime is weak.

2. Overt acts must be direct

The acts must clearly begin the execution of the intended felony. The law does not criminalize all preparatory behavior under Article 4(2).

Examples:

Merely carrying poison: not enough.
Pouring poison into food intended for the victim: likely enough.
Standing near someone’s pocket: not enough.
Actually reaching into the pocket to take property: enough.

3. The impossibility must not be due merely to interruption

If the felony could have been completed but for interruption, the case is usually attempted or frustrated, not impossible crime.

Example:

A places real poison in B’s drink, but B refuses to drink it because someone warns him. This is not impossible crime; the crime was possible.
A points a loaded gun and pulls the trigger, but someone deflects the arm. Again, not impossible crime.

The law of impossible crime applies when the intended crime could not be accomplished because of impossibility or ineffectual means, not merely because the offender was prevented.

4. There must be no actual completed offense that better fits the facts

Impossible crime often serves as a fallback classification when the intended crime cannot be produced and no other actual felony has been committed.

If another offense is actually consummated, that offense may supersede impossible crime.

Example:

A tries to poison B with harmless powder but also physically restrains and injures B. The injuries can generate liability for physical injuries.
A tries to steal from an empty house but breaks the door. There may be liability for trespass or malicious mischief depending on the facts.

Penalty for Impossible Crime

Under the Revised Penal Code, the penalty for impossible crime is generally arresto mayor or a fine within the range fixed by law.

Traditionally, the impossible crime is punished more lightly than attempted or frustrated felonies because no actual felony is produced and often no actual harm results, though the criminal intent is censured.

The relatively light penalty reflects the balance struck by the law:

the act is punishable because of criminal intent manifested in action;
but punishment is tempered because the intended felony was not and could not be accomplished as planned.

Why the Penalty Is Light

The penalty structure reveals how the law evaluates impossible crime:

There is moral blameworthiness because the offender had criminal intent.
There is social danger because that intent was put into action.
There is limited actual injury because the intended crime was not consummated and often could not have been consummated.

So the law punishes, but not as severely as if the offender had succeeded or nearly succeeded in causing the forbidden result.

Impossible Crime and the Principle That Intent Alone Is Not Punished

One recurring misconception is that impossible crime punishes “mere intent.”

That is not correct.

Philippine criminal law still adheres to the principle that mere criminal intent is not punishable. Impossible crime is punishable because intent is joined with:

an act,
an overt commencement of execution,
direct movement toward a crime against persons or property.

Thus, the law punishes criminal intent translated into objective action, not intent standing alone.

Impossible Crime and Mistake of Fact

Impossible crime is closely tied to mistake of fact, but they are not the same.

A mistake of fact usually exculpates when:

the act done would have been lawful had the facts been as the accused believed them to be, and
the mistake is honest and without fault.

In impossible crime, the opposite is true:

had the facts been as the accused believed them to be, the act would have been criminal.

Examples:

A shoots B believing B is a wild animal, but B is a person. This raises mistake of fact.
A stabs B believing B is alive, but B is already dead. This raises impossible crime.

So:

Mistake of fact may negate criminal intent.
Impossible crime presupposes criminal intent.

Impossible Crime and Intentional Felonies

Impossible crime generally belongs in the sphere of intentional felonies. Since intent is essential, it cannot ordinarily arise from negligence or imprudence.

A negligent act that fails to produce harm because the result is impossible is not an impossible crime in the Article 4(2) sense. The doctrine concerns a person who deliberately means to commit a crime.

Impossible Crime and Special Laws

Impossible crime is a concept from the Revised Penal Code. In applying it, one must distinguish between offenses punishable under the Code and those punishable under special penal laws.

As a rule, Article 4(2) speaks in the language of felonies against persons or property as understood within the framework of the Revised Penal Code. Special laws often punish acts based on statutory prohibition regardless of classic intent categories.

So care must be taken not to automatically transfer the impossible crime doctrine to offenses under special laws unless the statutory framework clearly allows it.

Controversies and Difficult Areas

1. Empty pocket cases: impossible crime or attempted theft?

This is one of the most discussed problems.

Argument for impossible crime

There is criminal intent to steal, overt acts are present, but there is no property to take. The accomplishment of theft is impossible under the circumstances.

Argument for attempted theft

The offender commenced the crime directly by overt acts; failure resulted from the absence of property, which some might treat as a circumstance external to completion.

Philippine treatment has classically recognized empty-pocket or empty-receptacle scenarios as impossible crime. That is the safer doctrinal statement in traditional bar and textbook discussion.

2. Present impossibility versus objective impossibility

Some situations seem impossible only because of temporary circumstances.

Example:

A enters a room to steal jewelry from a drawer, but at that moment the drawer is empty because the owner wore the jewelry that day.

Is that an impossible crime? Traditional doctrine tends to say yes, because the intended taking cannot be accomplished under the facts then existing.

The nuance lies in whether the impossibility is sufficiently concrete and immediate such that the intended felony cannot be committed at that time and place.

3. Where actual harm results incidentally

Suppose the offender aims to commit an impossible crime, but some actual injury occurs.

Example:

A fires at a supposed victim who is absent, but the bullet hits another person.

This is not impossible crime as to the actual victim injured. Liability attaches for the actual felony committed under ordinary rules, including transferred intent and other applicable principles where relevant.

Impossible crime cannot erase real criminal harm actually caused.

4. Whether there can be impossible robbery

If the intended act is robbery, but there is nothing to rob, the reasoning can point toward impossible crime against property. But if actual violence, intimidation, trespass, or damage occurs, liability may shift to those actual offenses or to attempted robbery depending on the facts.

As always, the exact classification turns on what elements are present and what actual acts were done.

Practical Requisites in Bar-Style Form

A concise working test:

A person is liable for an impossible crime when:

he intends to commit a crime against persons or property;
he performs overt acts directly toward its commission;
the act would have been an offense against persons or property;
the crime is not produced because:
- its accomplishment is inherently impossible, or
- the means employed are inadequate or ineffectual; and
the act is not otherwise punishable as another actual offense that better fits the facts.

Comparison Table in Narrative Form

Impossible crime vs attempted felony

In attempted felony, commission is possible but is stopped before all acts of execution are completed. In impossible crime, commission is impossible from the outset or by reason of useless means.

Impossible crime vs frustrated felony

In frustrated felony, all acts of execution are performed and would normally produce the crime, but the result does not occur due to causes independent of the will of the offender. In impossible crime, even full execution cannot produce the intended felony because the object or means makes completion impossible.

Impossible crime vs mere preparation

Preparation is not yet direct execution. Impossible crime requires overt acts that begin the felony’s execution.

Impossible crime vs mistake of fact

Mistake of fact may excuse because criminal intent is absent. Impossible crime punishes because criminal intent is present.

Importance of the Object of the Crime

The doctrine often turns on the object against which the criminal act is directed.

In crimes against persons

There must ordinarily be a living person to kill or injure. If the target is already dead, the intended crime against persons cannot be accomplished.

In crimes against property

There must be property capable of being unlawfully taken or injured. If the place targeted is empty and there is nothing to take, the intended theft or robbery cannot be accomplished as envisioned.

This is why absence of the living victim or absence of the property is often central in impossible crime analysis.

Impossible Crime and Subjective Criminality

The doctrine gives weight to subjective criminality—the offender’s evil intent—as manifested by objective acts. But Philippine law does not punish subjective criminality alone. It requires a concrete attempt to realize that criminal design.

Impossible crime therefore stands at the intersection of:

subjective evil intent, and
objective legal impossibility.

Theoretical Justification

From a jurisprudential standpoint, impossible crime reflects a compromise between two philosophies of punishment.

Objective approach

This approach emphasizes actual harm and completed unlawful result. From a purely objective perspective, if no crime could ever occur, punishment might seem excessive.

Subjective approach

This approach emphasizes the dangerous will of the actor. If a person fully intends murder and acts on it, the fact that the “victim” was already dead may not reduce the actor’s blame in moral terms.

Philippine law adopts a moderated subjective approach: it punishes the impossible crime, but with a lighter penalty.

Illustrative Hypotheticals

Hypothetical 1: Corpse stabbing

X enters a dark room and repeatedly stabs Y, intending to kill him. Y had already died an hour earlier of a heart attack.

Analysis: X is liable for impossible crime against persons. There is intent to kill and overt acts. Homicide or murder cannot be accomplished because Y is already dead.

Hypothetical 2: Fake poison

A wife mixes what she believes is arsenic into her husband’s coffee. The powder is actually flour.

Analysis: Impossible crime. She intended to kill; the means were ineffectual.

Hypothetical 3: Empty wallet

A pickpocket slips a hand into a passenger’s pocket intending to take the wallet, but the pocket is empty.

Analysis: Traditionally classified as impossible crime against property.

Hypothetical 4: Missed gunshot

Z shoots at W, who is alive and standing nearby, but misses because W ducks.

Analysis: Attempted homicide or attempted murder, not impossible crime. The crime was possible; it merely failed.

Hypothetical 5: Real poison, interrupted delivery

M pours real poison into food intended for N, but N never eats it because the plate is replaced.

Analysis: Attempted felony, not impossible crime, because the means were adequate and the intended crime was possible.

Hypothetical 6: No property in the vault

A burglar opens a safe intending to steal cash, but it had already been emptied earlier that day.

Analysis: Depending on facts and the actual offenses committed, this may be treated as impossible crime with respect to the intended taking. But actual liability for trespass, damage, or attempted robbery issues may also arise depending on the mode used.

Role of the Offender’s Belief

The offender’s belief about the surrounding facts is often decisive.

The law asks, in effect:

What crime did the offender intend?
What acts did the offender perform?
Why did the intended crime fail?

If it failed because the offender was mistaken about a fact that made accomplishment impossible, impossible crime may result.

Examples:

Belief that the victim is alive.
Belief that poison is real.
Belief that a pocket contains valuables.

Limits of the Doctrine

Impossible crime is not limitless. It should not be used when:

there is no criminal intent;
there are no overt acts of execution;
the intended act is not a crime against persons or property;
the failure is due merely to interruption, not impossibility;
the facts actually constitute another punishable offense.

This prevents Article 4(2) from swallowing the broader structure of stages of execution and actual crimes.

Impossible Crime and the Principle of Legality

Even though impossible crime punishes a resultless act, it still satisfies legality because it is expressly defined by statute. The Revised Penal Code directly creates criminal liability for such conduct. This is not punishment by analogy; it is punishment authorized by the Code itself.

Is Moral Turpitude Involved?

Whether impossible crime involves moral turpitude may depend on context and the legal issue involved. Because it involves deliberate criminal intent and overt acts toward a crime against persons or property, it strongly carries moral blame. But the precise legal classification of moral turpitude can vary depending on the statutory or administrative setting in which the question arises.

As a matter of criminal law theory, however, impossible crime reflects depravity of intent even if no actual felony is completed.

Relation to Conspiracy and Participation

An impossible crime may be committed by:

a single principal acting alone, or
more than one offender acting in concert.

If several persons agree and cooperate in performing overt acts toward an inherently impossible felony, their participation may be assessed under the usual rules on conspiracy and principals, subject to proof.

But conspiracy alone is not enough; there must still be overt acts toward the impossible commission of a crime against persons or property.

Relation to Mitigating or Aggravating Circumstances

Since impossible crime is still punishable under the Revised Penal Code, general principles on circumstances may become relevant where applicable, although the modest statutory penalty often limits the practical impact.

For example, questions may arise concerning:

minority,
intoxication,
relationship,
nighttime,
abuse of confidence,
voluntary surrender.

These must still be evaluated according to ordinary penal rules, provided they fit the facts and are compatible with the nature of the offense.

Procedural and Evidentiary Considerations

In prosecuting impossible crime, the key proof issues are usually:

Intent The prosecution must prove that the accused truly intended a crime against persons or property.
Overt acts It must show the accused began direct execution.
Reason for failure It must establish that failure resulted from impossibility or ineffectual means, not merely from interruption.
Absence of a more fitting actual offense If a concrete offense was actually committed, the prosecution must proceed on that basis where proper.

Because impossible crime often involves bizarre or incomplete facts, careful reconstruction of the accused’s acts and state of mind is essential.

Policy Criticisms

Some critics question the need for impossible crime, arguing that punishment should be tied more closely to actual harm. They say that where no injury and no real danger existed, criminal punishment may overreach.

Others defend the doctrine as necessary to address unmistakable criminal intent manifested in action. They point out that someone who stabs a corpse believing it to be alive is morally little different, in intent, from someone who stabs a living person.

Philippine law resolves this tension by punishing the act, but lightly.

Common Examination Points

In legal study and bar review, the impossible crime doctrine is frequently tested through distinctions. The common points are:

It applies only to offenses against persons or property.
There must be intent to commit the crime.
There must be overt acts directly toward commission.
The crime is not completed because of inherent impossibility or inadequate/ineffectual means.
It is different from attempted and frustrated felonies.
The classic examples are:
- stabbing a corpse,
- poisoning with a harmless substance,
- stealing from an empty pocket.

Condensed Doctrinal Statement

An impossible crime in Philippine criminal law is committed when a person, with intent to commit a felony against persons or property, performs overt acts directly tending to its execution, but the act does not produce the felony because its accomplishment is inherently impossible or because the means used are inadequate or ineffectual. The law punishes not mere evil thought, but criminal intent translated into action, even where the intended felony cannot actually be consummated.

Conclusion

The doctrine of impossible crime is one of the most intellectually interesting parts of Philippine criminal law because it sits between thought and deed, between moral guilt and legal injury, between danger and impossibility. It affirms that the Revised Penal Code is concerned not only with actual completed harm, but also with dangerous criminal conduct that clearly reveals an offender’s resolve to commit a crime against persons or property.

At the same time, the doctrine is carefully limited. It requires intent, overt acts, and an intended offense against persons or property. It applies only when the felony fails because it is impossible to accomplish or because the means are inadequate or ineffectual. It does not replace the law on attempted or frustrated felonies, nor does it punish bare thoughts or non-criminal intentions.

In the Philippine setting, impossible crime performs a narrow but important function: it ensures that a person who has clearly set out to kill, injure, or steal does not completely escape criminal liability merely because fate, circumstance, or the uselessness of the means made success unattainable. It is the law’s way of condemning criminal will in action, while still recognizing that no actual felony was consummated.