Assault in the First Degree (RSMo § 565.050) in Missouri

Assault in the First Degree is one of the most serious violent crime charges in Missouri. This felony offense carries potential prison sentences ranging from five to 30 years or even life imprisonment, depending on the circumstances. A conviction results in a permanent felony record, loss of civil rights, and consequences that affect every aspect of someone’s future.

If someone has been arrested or charged with Assault in the First Degree under RSMo § 565.050, understanding the charges, potential penalties, and available defenses is critical. At Rose Legal Services, we dedicate our practice exclusively to criminal defense, and we have extensive experience representing clients facing serious assault charges throughout Missouri.

What is Assault in the First Degree in Missouri?

Under RSMo § 565.050, “A person commits the offense of assault in the first degree if he or she attempts to kill or knowingly causes or attempts to cause serious physical injury to another person.”

This statute contains two different ways the State can prove its case:

• Attempting to kill another person, or
• Knowingly causing or attempting to cause serious physical injury to another person

The critical distinction between Assault in the First Degree and lesser assault charges is the level of intent and the severity of injury. First Degree Assault requires either an intent to kill or knowledge that one’s actions will cause serious physical injury.

“Serious Physical Injury” Under Missouri Law

The term “serious physical injury” has a specific legal definition in Missouri. Under RSMo § 556.061(27), serious physical injury means “physical injury that creates a substantial risk of death or that causes serious disfigurement or protracted loss or impairment of the function of any part of the body.”

Examples of serious physical injury may include:

• Injuries that create a substantial risk of death
• Permanent scarring or disfigurement
• Loss of a limb or bodily function
• Brain injuries or traumatic head injuries
• Severe burns
• Injuries requiring extensive medical treatment or surgery
• Broken bones that cause protracted impairment

The prosecution must prove that the injury meets this legal definition. Not every significant injury qualifies as “serious physical injury” under Missouri law.

Penalties for Assault in the First Degree

Assault in the First Degree is classified as either a Class B felony or a Class A felony, depending on the circumstances.

Class B Felony

Under RSMo § 565.050.2, “The offense of assault in the first degree is a class B felony unless in the course thereof the person inflicts serious physical injury on the victim, or if the victim of such assault is a special victim… in which case it is a class A felony.”

According to Missouri’s felony classification system, a Class B felony carries a potential sentence of five to 15 years in prison.

Class A Felony

Assault in the First Degree becomes a Class A felony if:

• The defendant actually inflicts serious physical injury on the victim (not just attempts to cause it), or
• The victim is a “special victim” as defined under RSMo § 565.002

Special victims include:

• Law enforcement officers
• Emergency personnel, including firefighters and emergency medical technicians
• Employees of correctional facilities, jails, or detention centers
• Probation and parole officers
• Elderly persons (60 years or older)
• People with disabilities
• Vulnerable persons
• Highway workers in work zones
• Utility workers
• Healthcare workers

According to Missouri law, a Class A felony carries a potential sentence of 10 to 30 years in prison or life imprisonment.

Assault in the First Degree as a Dangerous Felony

Assault in the First Degree is classified as a “dangerous felony” under Missouri law. This classification carries significant consequences.

Under RSMo § 558.019, defendants convicted of dangerous felonies must serve at least 85% of their sentence before becoming eligible for parole or probation. This means someone sentenced to 15 years for Assault in the First Degree must serve at least 12 years and nine months before release.

Additionally, dangerous felony convictions count toward persistent offender and prior offender enhancements, which can increase sentences for future convictions.

No Bond for Certain First Degree Assault Cases

Under RSMo § 544.671, bond may be denied entirely for certain defendants charged with Assault in the First Degree. This statute applies when there is clear and convincing evidence that the defendant committed the offense and poses a danger to the victim, the community, or any other person.

This means someone charged with Assault in the First Degree may be held without bond until trial, depending on the facts of the case and the court’s determination.

Elements the Prosecution Must Prove

To convict someone of Assault in the First Degree, the prosecution must prove beyond a reasonable doubt:

• The defendant acted with the required mental state: Either attempting to kill or knowingly causing or attempting to cause serious physical injury
• The defendant’s actions were directed at another person
• The actions resulted in (or were intended to result in) serious physical injury or death

If the prosecution cannot prove any of these elements beyond a reasonable doubt, the defendant should be found not guilty.

Common Scenarios Leading to First Degree Assault Charges

Assault in the First Degree charges commonly arise from:

• Physical altercations where someone sustains serious injuries, such as traumatic brain injuries or broken bones
• Shootings or stabbings where the victim survives but suffers serious injury
• Bar fights or street altercations that escalate to the use of deadly weapons or result in serious injury
• Assaults on law enforcement officers or emergency personnel
• Vehicle-related assaults, such as intentionally hitting someone with a car

The specific facts and circumstances of each case determine whether Assault in the First Degree charges are appropriate or whether lesser charges should apply.

Defenses to Assault in the First Degree Charges

Several defenses may be available to someone charged with Assault in the First Degree, depending on the specific circumstances.

Self-Defense

Missouri law allows individuals to use reasonable force to defend themselves from what they reasonably believe to be the use or imminent use of unlawful force under RSMo § 563.031.

To successfully claim self-defense, the defendant must show:

• They reasonably believed force was necessary to defend themselves
• The force used was proportional to the threat faced
• They were not the initial aggressor (or had withdrawn from the encounter if they were)

Self-defense is an affirmative defense. Once the defendant presents evidence supporting it, the burden shifts to the prosecution to disprove self-defense beyond a reasonable doubt.

Defense of Others

Similar to self-defense, Missouri law permits the use of force to protect another person from unlawful force under RSMo § 563.031. The same principles apply: the belief in the necessity of force must be reasonable, and the force used must be proportional.

Lack of Intent

Assault in the First Degree requires either an intent to kill or knowledge that one’s actions would cause serious physical injury. If the defendant did not have the required mental state, they cannot be convicted of First Degree Assault.

For example, if someone recklessly caused serious injury but did not knowingly intend to cause such injury, the appropriate charge may be Assault in the Second Degree under RSMo § 565.052, not First Degree Assault.

Mistaken Identity

In some cases, the wrong person is accused of the assault. Witness misidentification, poor lighting, chaotic circumstances, or lack of physical evidence linking the defendant to the crime can all support a mistaken identity defense.

Insufficient Evidence

The prosecution must prove every element of the offense beyond a reasonable doubt. If there is insufficient evidence to establish that the defendant committed the alleged act, that the required mental state existed, or that the injury meets the definition of “serious physical injury,” the charges may be reduced or dismissed.

Constitutional Violations

If law enforcement violated the defendant’s constitutional rights during the investigation, arrest, or interrogation, evidence obtained as a result may be suppressed. This can significantly weaken the prosecution’s case.

Examples include:

• Illegal searches or seizures in violation of the Fourth Amendment
• Failure to provide Miranda warnings before custodial interrogation
• Coerced confessions
• Violation of the right to counsel

Collateral Consequences of an Assault in the First Degree Conviction

Beyond imprisonment, a conviction for Assault in the First Degree carries severe collateral consequences:

• Permanent felony criminal record that appears on background checks
• Loss of firearm rights under federal and state law
• Difficulty finding employment, especially in fields requiring background checks or professional licensing
• Housing restrictions, as landlords may deny applications from individuals with violent felony convictions
• Loss of voting rights while incarcerated
• Immigration consequences for non-citizens, including potential deportation
• Impact on child custody and visitation rights
• Ineligibility for certain government benefits and programs
• Social stigma associated with a violent felony conviction

These consequences can last a lifetime, even after completing a prison sentence.

What to Do After Being Charged with Assault in the First Degree

If someone has been arrested or charged with Assault in the First Degree in Missouri:

Remain silent and request an attorney immediately. Do not make any statements to law enforcement without an attorney present. Everything said can be used in court.

Do not discuss the case with anyone except an attorney. This includes friends, family, and especially on social media. Statements made to others can be used as evidence.

Preserve any evidence that supports the defense. This may include text messages, emails, photos, videos, medical records, or witness contact information.

Do not contact the alleged victim. Contact with the victim can result in additional charges, such as witness tampering, or violation of a protective order if one has been issued.

Consult with an experienced criminal defense attorney as soon as possible. The sooner an attorney is involved, the better the chances of achieving a favorable outcome.

How Rose Legal Services Defends Assault in the First Degree Charges

At Rose Legal Services, we have extensive experience defending clients against serious assault charges throughout Missouri. Assault cases are one of our most common types of cases, so all of our attorneys are very experienced in handling these charges.

When someone works with our firm on an Assault in the First Degree case, they benefit from:

• Attorneys who dedicate their practice exclusively to criminal defense
• A team approach with attorneys, staff members, and an investigator working together
• Thorough investigation of the allegations and evidence
• Review of medical records, witness statements, and physical evidence
• Strategic defense planning tailored to the specific circumstances

We understand that people make mistakes, and that sometimes, people are wrongfully accused or acted in self-defense. Our approach is never to judge. Our mission is to provide the strongest possible defense and get the best possible outcome for every client we represent.

Assault in the First Degree Charges Require Immediate Action

Assault in the First Degree is one of the most serious criminal charges in Missouri. A conviction can result in decades in prison and lifelong consequences. But being charged is not the same as being convicted.

If someone has been arrested or charged with Assault in the First Degree under RSMo § 565.050, they need experienced legal representation immediately. At Rose Legal Services, we are here to help good people get a second chance.

Your defense starts with a conversation.