Anyone charged with assault in Missouri immediately wants to know what penalties they’re up against. Missouri separates assault into multiple degrees. What other states might consider “aggravated assault” is called assault in the first or second degree in Missouri.

Both of these crimes are felonies. When you understand the potential consequences and how they vary depending on the circumstances, you can make informed decisions about your defense.

Assault in the First Degree

Assault in the first degree happens if you:20252026

• Attempt to kill someone, or

• Knowingly cause or attempt to cause serious physical injury to another person

The penalties for first-degree assault depend on the specific circumstances and who the victim is. Most first-degree assault cases are Class B felonies, which carry five to 15 years in prison. If the assault causes serious physical injury or if the victim is a “special victim” (for example, a law enforcement officer, healthcare worker, or other protected person), the charge escalates to a Class A felony. Class A felonies carry 10 to 30 years in prison, or life in prison.

Assault in the Second Degree

Assault in the second degree covers a wider range of situations, including:

• Attempting to kill or knowingly causing serious physical injury while under the influence of “sudden passion”

• Attempting to cause or knowingly causing physical injury with a deadly weapon or dangerous item

• Recklessly causing serious physical injury

• Recklessly causing physical injury by discharging a firearm

Second-degree assault penalties vary depending on who the victim is. Standard second-degree assault is a Class D felony, punishable by one to seven years in prison. However, if the victim is a special victim, the charge can escalate to a Class B felony (five to 15 years in prison). Second-degree assault also carries fines and potential probation. The prison terms are usually shorter than for first-degree assault unless aggravating factors apply.

Special Victims, Weapons, and Firearms

Missouri law gives extra protection to certain groups of people. Special victims include:

• Law enforcement officers

• Judges

• Firefighters

• Healthcare workers and others performing official duties

• An elderly, disabled, or otherwise vulnerable person

Assaulting a special victim can significantly increase the sentence. For example, second-degree assault against a special victim increases the potential prison time from a maximum of seven years to a maximum of 15 years.

Using a deadly weapon or discharging a firearm during an assault generally increases penalties, too. For second-degree assault, causing injury with a weapon is a core element of the offense. First-degree assault charges can also involve weapons if serious injury results. Courts treat weapon-related assaults more harshly because of the increased risk to the victim.

Factors That Influence Sentencing

Judges consider several factors when determining the sentence for assault in Missouri:

• The injury: More serious injuries can elevate a charge to Class A in first-degree assault.

• Victim status: Attacks on special victims have higher penalties.

• Weapons: Firearms or dangerous instruments typically increase the charge or sentence.

• Prior record: Repeat offenders typically face longer prison terms.

• Surrounding circumstances: Assaults committed during other crimes or in particularly dangerous situations may lead to harsher sentencing.

Working with an experienced aggravated assault defense attorney is the best way to reduce the sentence or fight for acquittal and dismissal.

Legal Defenses

Defending against assault charges often requires challenging the prosecution’s evidence or proving that you had a lawful reason to commit assault. Common defenses include:

• Self-defense and defense of others: If you were protecting yourself or someone else from imminent harm, that’s an affirmative defense that could justify your actions.

• Sudden passion: If you’re charged with second-degree assault, showing the act occurred under “sudden passion arising from adequate cause” can reduce the charge. Sudden passion is defined as “passion directly caused by and arising out of provocation by the victim or another acting with the victim.”

• Mistaken identity or lack of intent: The evidence may show that you were not responsible or did not intend harm, which can lead to reduced or dismissed charges.

Discuss Your Case with a St. Louis County Criminal Defense Lawyer

Assault charges in Missouri carry serious consequences, but a strong defense can make a difference. If you’re facing assault charges in St. Louis, MO, or the surrounding counties, the attorneys at Frank & Juengel Law Group P.C. can help. Contact us to explore your options.