When is an act committed through negligence a criminal offense?

Quick Overview: An act committed through negligence is a criminal offense only if the Criminal Code expressly stipulates, for a specific offense, that negligence is sufficient. It is therefore not sufficient that someone was negligent or caused damage. The act must be a crime specified in the law, all elements of the offense must be present, there must be culpability at least due to negligence, and, at the same time, a causal link between the breach of duty and the consequence must be proven. According to Section 13(2) of the Criminal Code, criminal liability otherwise requires intentional culpability.

What Is Culpability in Criminal Law

Culpability is the perpetrator’s internal relationship to their actions and to the consequence that their conduct causes or may cause. In criminal law, it is not merely a matter of a harmful consequence having occurred. Law enforcement authorities must also examine whether the perpetrator acted intentionally, negligently, or whether criminal culpability cannot be attributed to them at all.

The Criminal Code stipulates that a criminal offense is an unlawful act that the law designates as a crime and that exhibits the characteristics specified in the law. Criminal liability generally requires intent. Negligence is sufficient only if the Criminal Code expressly provides for it in relation to a specific criminal offense.

This is precisely the fundamental difference from common perception. It is not enough that someone acted carelessly. If the elements of a criminal offense do not permit negligence, the perpetrator cannot be convicted of such an offense merely because they were inattentive.

The situation is different for misdemeanors committed by natural persons. In such cases , Act No. 250/2016 Coll., on Liability for Misdemeanors and Proceedings Thereof, establishes the opposite principle: For a natural person to be held liable for an administrative offense, fault is required, and negligence is sufficient unless the law expressly requires intent.

In practice, therefore, the same conduct may result in different outcomes. Sometimes it will constitute a criminal offense, other times merely an administrative offense or civil liability for damages. The determining factors are the specific legal elements of the offense, the severity of the consequences, the degree of breach of duty, and the harm to society.

The Difference Between Intent and Negligence

The Criminal Code distinguishes between two basic forms of culpability: intent and negligence.

In the case of intent, the perpetrator either intends to violate or endanger an interest protected by criminal law, or knows that his or her conduct may cause such a consequence and , in the event that it does, is willing to accept it. The Criminal Code expressly adds that acceptance also includes the perpetrator’s resignation to a possible consequence.

In the case of negligence, the perpetrator does not intend to cause the consequence. Either the perpetrator knows that the consequence may occur but, without reasonable grounds, relies on the fact that it will not happen, or the perpetrator fails to recognize the risk, even though, given the circumstances and personal circumstances, the perpetrator should and could have known.

In practice, the distinction between intent and negligence is often complex. It is not merely a matter of what the defendant claims after the act. The police, the prosecutor, and the court assess the entire situation: the manner of the conduct, prior warnings, the offender’s expertise, the instrument used, the duration of the conduct, the severity of the breach of duty, and whether the offender attempted to prevent the consequence.

For example, a driver who significantly exceeds the speed limit in a built-up area and causes an accident usually does not intend to injure anyone. Nevertheless, they may be held criminally liable for a negligent offense if the violation of traffic rules resulted in bodily injury, serious harm, or death.

Conversely, a person who repeatedly stabs someone with a knife in vital parts of the body can hardly defend themselves by claiming that they “did not intend to cause anything serious.” The court may infer intent—at least indirect intent—from the circumstances.

Intentional Conduct

Intent is divided into direct and indirect. Both forms are sufficient for criminal liability if the law requires intentional culpability.

Direct intent means that the perpetrator intended, through their actions, to violate or endanger a protected interest. Typically, they know what they are doing and are specifically seeking that result.

Example: A man prepares a crowbar, gloves, and a bag; at night, he pries open the door of a store and takes money from the cash register. He wants to take possession of someone else’s money and knows that he is acting unlawfully. This is not a case of negligence, but of intentional conduct.

Indirect intent means that the perpetrator does not necessarily want the consequence as the primary goal, but knows that it may result from their actions and is aware of this possibility. The Criminal Code also considers the perpetrator’s acceptance of the fact that they may violate or endanger a protected interest to be awareness.

Example: After an accident, a driver sees that the pedestrian he struck is lying off the road at night, bleeding and motionless. Nevertheless, he drives away, does not call for help, and relies solely on the hope that “someone will find him.” While negligence may be an issue regarding the consequences of the accident, the failure to render aid may constitute intentional conduct, because the driver is aware of the serious danger and consciously decides not to help.

In practice, indirect intent is more difficult to prove than direct intent. The court cannot automatically base its decision solely on the fact that the perpetrator was indifferent or irresponsible. It must evaluate all the circumstances as a whole.

Example: During an argument, a man yells at his neighbor that he crashed into his car and that he might “kill” him, and then slaps him. Such conduct may be unlawful and, in certain specific cases, even criminal, but the verbal threat of “death” and the physical assault alone do not automatically constitute attempted murder. The court considers the intensity of the attack, the means used, the location of the assault, prior behavior, and the consequences.

In practice, we often see that people underestimate the difference between “I didn’t mean to” and “I should have known this could happen.” Criminal law does not rely solely on what the perpetrator retrospectively describes as their intent, but on what can be objectively inferred from their actions.

Negligence: When It’s No Longer Enough to Say “It Was Just a Mistake”

Negligence does not simply mean bad luck. Criminal liability for negligence arises when the perpetrator breaches a duty of care and causes a consequence that they could and should have foreseen.

According to Section 16 of the Criminal Code , there are two basic forms of negligence: conscious and unconscious. In addition to these, the law also recognizes gross negligence, which constitutes a more serious form of negligent conduct.

For an act to constitute a crime of negligence, several conditions must be met:

• the Criminal Code must recognize negligence as an element of the offense in question,
• the perpetrator must have violated a specific duty of care,
• the consequence must have been foreseeable,
• the perpetrator could and should have acted differently,
• there must be a causal link between the breach of duty and the consequence,
• the act must reach the required level of social harmfulness.

Typically, therefore, an investigation is conducted to determine whether the perpetrator violated traffic regulations, safety rules, work procedures, the obligations of a property owner, animal care rules, or professional standards of a particular profession.

However, not every breach of duty automatically constitutes a criminal offense. If someone causes minor damage without injury, the matter may be resolved under civil law or as a misdemeanor. Criminal law applies only in more serious cases where liability under another legal provision is insufficient. The Criminal Code expressly states that criminal liability may be imposed only in cases that are socially harmful, where liability under other legal provisions is insufficient.

Conscious Negligence

Conscious negligence occurs when the perpetrator knows that their conduct may violate or endanger an interest protected by criminal law, but, without reasonable grounds, relies on the fact that this will not happen.

In other words: they are aware of the risk but underestimate it. For example, they might tell themselves that they’ll “manage somehow,” that “nothing will happen,” or that “they’ve done this many times before.”

Example: A homeowner knows that roof tiles are coming loose. Neighbors repeatedly point this out to him, but he puts off repairs because he assumes the roof will hold up for a while longer. During a strong wind, part of the roofing comes loose, falls onto the sidewalk, and injures a passerby. The homeowner did not intend to hurt anyone, but he was aware of the risk and, without a reasonable basis, relied on the assumption that no injury would occur.

Another typical example involves traffic. A driver knows that the road is icy, his tires are worn out, and he is driving too fast. Nevertheless, he continues because he is in a hurry and believes he can control the car. If he causes a serious accident, this may constitute willful negligence.

In cases of willful negligence , it is crucial to prove that the perpetrator was actually aware of the risk. Previous warnings, professional qualifications, experience, the obvious nature of the danger, or the perpetrator’s own statements may be important factors.

Unconscious Negligence

Unconscious negligence occurs when the perpetrator does not know that their actions may cause a criminally significant consequence, but given the circumstances and their personal situation, they should have and could have known.

Here, it is essential that the perpetrator did not actually perceive the risk. The law, however, still holds them accountable for failing to perceive it. A layperson will be assessed differently than a professional. A different level of caution is expected from an ordinary pedestrian than from a doctor, a construction engineer, a bus driver, or a manager responsible for workplace safety.

Example: A driver sets out after dark without turning on his headlights. He fails to notice that the vehicle is not visible and strikes a cyclist on the shoulder of the road. He may not have intended to endanger anyone, and he may not have realized the risk at that moment. Nevertheless, he should have and could have known that he must turn on his headlights in low-visibility conditions and that an unlit vehicle can endanger others.

Example from the workplace: A supervisor allows an employee to operate a machine without a protective guard because he fails to realize that this guard is essential for safe operation. If the manager holds a position of authority, has received appropriate training, and bears responsibility for safety, it can be assessed whether he should have and could have foreseen such a risk.

Unconscious negligence does not mean that the perpetrator “knew nothing about it and is therefore automatically free from liability.” Quite the contrary. The court examines whether the perpetrator could and should have been aware of the risk based on the specific situation.

Gross Negligence

Gross negligence is a higher degree of negligence. The Criminal Code defines it as a situation where the offender’s approach to the requirement of due care demonstrates obvious disregard for the interests protected by criminal law.

In layman’s terms, this refers to situations where the perpetrator does not merely violate a duty slightly or by mistake, but clearly and significantly ignores basic rules of caution. Gross negligence can manifest itself in both conscious and unconscious negligence.

Example: A pet owner leaves for an extended period and keeps the dogs locked up without sufficient access to water and food. If this results in the animal’s death or permanent health consequences, it may constitute animal neglect due to negligence. The Criminal Code explicitly refers to gross negligence in connection with this offense.

Gross negligence is also relevant to the severity of the punishment or the aggravated elements of the offense. For example, in the case of certain offenses, ordinary negligence is not sufficient; rather, the law requires a gross violation of the rules or gross negligence.

Typical Crimes of Negligence

In practice, crimes of negligence mainly occur when someone violates their duty of care and causes serious consequences.

Common areas include, in particular:

• traffic accidents,
• workplace accidents,
• medical and other professional malpractice,
• improperly secured construction sites, roofs, or excavations,
• fires and other hazardous situations,
• neglect of animals,
• violations of important safety or operational rules.

The Criminal Code addresses, for example, negligent homicide under Section 143, aggravated negligent bodily injury under Section 147, and negligent bodily injury under Section 148. In the case of negligent bodily injury, the law requires, among other things, a violation of an important duty arising from employment, profession, position, function, or imposed by law.

Another example is negligent endangerment of the public under Section 273 of the Criminal Code. This may apply to situations where someone negligently causes a public danger, for example, through fire, explosion, gas, electricity, or other similarly dangerous conduct.

Under Section 14 of the Criminal Code, negligent offenses are always misdemeanors. However, this does not mean they are insignificant. Even a misdemeanor can result in imprisonment, a ban on certain activities, a fine, a criminal record, or an obligation to pay damages.

In practice, secondary consequences are also often addressed. For a driver, this may involve a driving ban. For a doctor, professional driver, technician, or security officer, a conviction may affect their professional license or ability to continue working.

Negligent Homicide and Bodily Injury in a Car Accident

Traffic accidents are among the most common examples of crimes of negligence. As a rule, a driver does not intend to injure or kill anyone. Nevertheless, they may be criminally liable if they violate traffic rules or another important duty and thereby cause a serious consequence.

Conscious negligence: A driver is driving significantly above the speed limit in heavy city traffic. He knows he is breaking the rules and that there are crosswalks, schools, and pedestrians in the area. However, he relies on the fact that he has the car under control. When he brakes suddenly, he hits a child at a crosswalk. If other legal conditions are met, he may be liable for a crime of negligence.

Unconscious negligence: A driver sets off at night without headlights because he fails to notice that they are not on. He fails to see a cyclist and causes him serious injuries. He did not realize the risk at that moment, but he should have and could have known that a vehicle must be illuminated in the dark.

Gross negligence: A driver gets behind the wheel after consuming alcohol, drives fast, fails to pay attention to the road, and veers into oncoming traffic. If this results in death or serious bodily injury, the court may assess his conduct as a particularly serious breach of the duty of care. However, it always depends on the specific circumstances, the blood alcohol level, the manner of driving, the causal link, and the consequences.

In traffic accidents, it is assessed very carefully whether it was specifically the driver’s breach of duty that led to the consequence. It is not enough simply to state that an accident occurred. It is necessary to determine who breached which duty, whether the accident could have been prevented, and whether the outcome was caused by other circumstances.

For example, in an accident involving a pedestrian and a driver, factors such as the vehicle’s speed, visibility, the pedestrian’s behavior, road conditions, reaction time, the vehicle’s technical condition, and an expert opinion from the field of transportation may be considered. It is precisely these expert opinions that often determine whether the incident constitutes a criminal offense, a misdemeanor, or an unfortunate event through no one’s fault.

How Negligence Is Proven

Proving negligence is not merely a matter of pointing to the outcome. The fact that someone suffered harm or that damage occurred is not sufficient in and of itself.

Law enforcement authorities typically examine, in particular:

• what specific duty was allegedly breached,
• where this duty arose from,
• whether the perpetrator could have fulfilled it,
• whether the consequence was foreseeable,
• whether there is a causal link between the breach of the duty and the consequence,
• whether any other circumstance intervened that caused or significantly influenced the consequence,
• whether the matter involves only civil or misdemeanor liability.

For professionals, their profession, experience, and the rules of their field are taken into account. A professional driver is expected to exercise a different level of care than someone who drives only occasionally. For a doctor, a construction supervisor, or an operator of technical equipment, the professional standard will be examined.

The most common mistake in practice is that, after the incident, the accused simply claims, “I didn’t mean to.” However, this is not decisive in cases of negligence. In negligence-based criminal offenses, it is precisely assumed that the perpetrator did not intend the consequence. What matters is whether they could and should have foreseen it and whether they violated their duty of care.

Culpability and Insanity

Insanity is a special issue. According to Section 26 of the Criminal Code, a person is not criminally liable if, due to a mental disorder at the time of committing the act, they were unable to recognize its unlawfulness or control their conduct.

Insanity, therefore, does not merely refer to a general diagnosis or a limitation of legal capacity. What is decisive is the perpetrator’s condition at the time of the specific act and their ability to recognize the unlawfulness of the act or to control their conduct. In practice, this issue is assessed primarily through an expert opinion from the field of psychiatry or, where applicable, psychology.

This may involve a long-term mental disorder, but it may also be a short-term condition, provided it meets the legal requirements. Example: A person suffers a sudden epileptic seizure during which they fall uncontrollably into a shelf, causing damage and injuring another customer. If the person was truly unable to control their actions or recognize their significance, they will not be held criminally liable for a negligent act.

It is necessary to distinguish diminished mental capacity from insanity. According to Section 27 of the Criminal Code, a person has diminished mental capacity if, due to a mental disorder at the time of the act, their ability to recognize the unlawfulness of their actions or to control their conduct was substantially impaired. Diminished mental capacity does not in itself preclude criminal liability, but it may be relevant when imposing a sentence or a protective measure.

Alcohol, Drugs, and the Crime of Public Intoxication

Cases where a person renders themselves incapable of discernment by consuming alcohol or other addictive substances constitute a separate category. In such cases, the law does not accept a simple excuse such as “I was drunk; I don’t remember anything.”

The Criminal Code addresses the crime of public intoxication in Section 360. A person commits this offense if , through the consumption or administration of an intoxicating substance—even through negligence—they render themselves incapacitated and, while in that state, commit an act that would otherwise be a criminal offense. The basic sentence is 3 to 10 years of imprisonment, but if a more lenient sentence is prescribed for the otherwise criminal act, that more lenient sentence applies.

The law also stipulates that the provisions on intoxication or insanity do not apply if the offender brought themselves into a state of insanity with the intent to commit a criminal offense, or if they committed a criminal offense through negligence consisting of bringing themselves into a state of insanity.

In practice, this means that intoxication can significantly complicate the legal assessment. A person who got drunk and destroyed something while in a state of insanity will be assessed differently than a person who got drunk with the intention of assaulting someone, and differently still than a driver who gets behind the wheel after drinking and causes an accident.

Therefore, in cases involving alcohol and drugs, one cannot automatically claim that the perpetrator “is not liable because they were not in their right mind.” Czech law also holds individuals accountable for a state they have brought upon themselves.

When It’s Just a Misdemeanor or Compensation for Damages

Not every instance of negligence falls under criminal law. This is particularly important in everyday situations.

For example, if someone breaks someone else’s property due to inattention, causes minor damage, or violates an administrative obligation, it will often be a matter of civil liability for damages or a misdemeanor. For misdemeanors committed by individuals, negligence is generally sufficient, unless the law requires intent.

Criminal law should be a last resort. According to the principle of subsidiarity in criminal prosecution, criminal liability applies only in cases that are socially harmful, where liability under another legal provision is insufficient.

Example: While moving, a person damages a neighbor’s door due to inattention. Typically, this would involve compensation for damages. However, if a construction company grossly violates safety regulations, fails to properly secure an excavation site, and a passerby suffers serious injury, the matter may fall under criminal law.

The difference lies in the severity of the consequence, the type of duty breached, and the degree of foreseeability. Therefore, in borderline cases, it is advisable to assess not only the consequence itself but also the entire factual situation.

Summary

An act committed through negligence is a criminal offense only if the Criminal Code expressly permits negligence as a form of culpability for a specific offense. The basic rule of criminal law is intentional culpability; negligence is an exception established by law.

Negligence can be conscious or unconscious. In cases of conscious negligence, the perpetrator is aware of the risk but, without reasonable grounds, relies on the consequence not occurring. In the case of unconscious negligence, the perpetrator is unaware of the risk, even though, given the circumstances and their personal situation, they should and could have known. Gross negligence implies obvious disregard for the requirement of due care.

In practice, crimes of negligence are most commonly addressed in cases involving traffic accidents, workplace accidents, fires, neglect of animals, or violations of important safety rules. It is always necessary to examine the specific duty, its breach, the foreseeability of the consequence, and the causal link.