By: Parsons, Graham & Day, LLC July 20, 2025

How Voluntary Manslaughter Defenses Differ from Involuntary Manslaughter in Tulsa

What is Manslaughter in Oklahoma?

Manslaughter is generally defined as the unlawful killing of a human being without malice aforethought. In Oklahoma, the law recognizes two primary types of manslaughter. The main difference lies in the presence or absence of intent to kill. Intent or lack of intent is a critical distinction that can dramatically impact the charge and the possible defenses available.

Voluntary Manslaughter in Oklahoma

Oklahoma law defines voluntary manslaughter as a killing that occurs “in the heat of passion” that is caused by a provocation that would be deemed sufficient to stir a reasonable person’s emotions.

The provocation must be so strong and sudden that it temporarily overwhelms a person’s reason, causing them to lose control. The act of killing must also take place immediately after the provocation, with no time for “cooling off.” The person may have intended to kill, but they did so under a sudden and powerful emotion, not from a place of long-held hatred or malice.

Examples of provocation may include:

A person finds their spouse in the act of adultery and immediately kills them or the person they are with
An individual reacts to a sudden, violent physical assault by a person and kills them in the moment

The core legal defense is to show that the defendant’s actions were a direct result of a heat of passion and that the provocation was sufficient to reduce the crime from murder to voluntary manslaughter.

Involuntary Manslaughter in Oklahoma

In contrast to voluntary manslaughter, involuntary manslaughter involves a killing that occurs without any intent to kill. Oklahoma law provides three specific ways a person can commit involuntary manslaughter, as outlined in Oklahoma Statutes, Title 21, Section 711.

The first two are:

While committing a misdemeanor
While committing a lawful act in an unlawful manner, or without due caution and circumspection

These acts apply when a person is performing a legal action, but their actions are reckless or careless to a degree that they unintentionally cause the death of another.

The third way is through the reckless killing of a human being. The reckless killing of a human being involves a person acting with a high degree of negligence or gross disregard for human life, which results in a death, but without the intent to kill. This act is distinct from a mere accident. A person is considered to have acted “recklessly” if their conduct were a gross deviation from a standard of care a reasonable person would observe.

The Core Difference: State of Mind

The fundamental difference between these two charges is the state of mind of the defendant. This distinction is what guides a criminal defense strategy. In a voluntary manslaughter case, the defense must admit to the killing but argue that the defendant’s state of mind at the time warrants a lesser charge.

For an involuntary manslaughter case, the defense would challenge whether the defendant’s actions met the legal definition of recklessness or carelessness required by the statute.

Defenses for Each Type of Manslaughter Charge

Because the two crimes are so different, their defenses are built on different legal arguments.

Defenses for Voluntary Manslaughter

The primary defense for a voluntary manslaughter charge is to prove the existence of a sudden and adequate provocation. Our defense attorneys work to show that a person’s sudden, emotional reaction was a direct result of an event that would cause a reasonable person to act without thinking clearly. Proving provocation often involves gathering evidence to support the claim of provocation and a lack of a cooling-off period. Our defense strategy would focus on the facts surrounding the event and the defendant’s state of mind.

Defenses for Involuntary Manslaughter

Defending an involuntary manslaughter charge means challenging the elements of the crime itself. For example, if the charge is based on a misdemeanor, we might argue that the misdemeanor was not what caused the death. If the charge is based on a reckless act, our defense would focus on whether the defendant’s actions truly met the high standard of recklessness required by the law, or if the event was a tragic accident with no criminal intent. A key part of our defense is to show that the death was not the result of a conscious disregard for human life.

The Importance of Experienced Legal Representation in Tulsa

Manslaughter charges are complex and require a deep understanding of Oklahoma’s criminal statutes. A skilled lawyer can investigate the facts, challenge evidence, and build a strong defense.

Our firm’s attorneys are experienced in a wide range of criminal cases, and we are committed to providing compassionate and effective legal representation. Our dedicated legal team works hard to ensure our clients receive personal attention from our staff throughout their case.

We understand how intimidating it can be for someone facing serious criminal charges. Our goal is to make sure you have the support you need to navigate the legal process and work to get your life back to normal.

If you are facing a criminal charge in Tulsa or the surrounding areas, including a manslaughter charge, Parsons, Graham & Day, LLC, is here to help. We believe in compassion, availability, and reasonable rates.