Aggravated Assault in South Dakota: Penalties and Defenses

Aggravated assault in South Dakota is a Class 3 felony punishable by up to 15 years in state prison and a fine of up to $30,000. The charge applies when someone causes or tries to cause serious bodily injury, uses a dangerous weapon, strangles another person, or threatens someone with a deadly weapon. Prosecutors have seven years to file charges, and a conviction brings consequences that outlast any prison term.

What Conduct Counts as Aggravated Assault

South Dakota’s statute lists five separate paths to the same felony charge. You can be prosecuted for aggravated assault if you:

Cause or attempt to cause serious bodily injury to another while showing extreme indifference to human life
Cause or attempt to cause bodily injury to another with a dangerous weapon
Assault another with intent to injure and actually cause serious bodily injury
Threaten another with a deadly weapon in a way that puts the person in fear of imminent serious harm
Strangle or suffocate another by applying pressure to the throat or neck, or blocking the nose and mouth, so the person fears death or serious injury

The paths are not identical. Some require an actual serious injury. Others require only an attempt. The strangulation provision does not require any visible injury at all.¹

Dangerous and Deadly Weapons

South Dakota treats “dangerous weapon” and “deadly weapon” as the same thing. The definition covers firearms, stun guns, and knives, but it also reaches any device, instrument, or material either designed to inflict death or serious bodily harm or used in a way that makes death or serious harm likely.² That “manner in which it is used” language matters in practice. A car, a bottle, or a piece of furniture can qualify when it’s swung, thrown, or driven in a way likely to cause serious harm. Courts look at how the object was wielded, not what it was built for.

What “Serious Bodily Injury” Means

South Dakota defines serious bodily injury as an injury that is “grave and not trivial” and “gives rise to apprehension of danger to life, health, or limb.”² That reaches further than many people assume. The injury doesn’t have to be life-threatening on its own. It just has to be serious enough to raise genuine concern about the victim’s life or long-term health. Prosecutors establish this through medical records, expert testimony, and photographs.

Prison Time, Fines, and Enhancements

A standard aggravated assault conviction is a Class 3 felony. The maximum sentence is 15 years in a state correctional facility and a fine of up to $30,000.¹ The actual sentence depends on the severity of the injury, whether a weapon was involved, and the defendant’s criminal history. Restitution is mandatory on any felony sentence and covers medical bills, lost wages, and other losses the victim can document.³ Courts routinely add probation conditions such as anger management, substance abuse testing, and no-contact orders.

Assaults on Officers and Other Protected Personnel

When the victim is a law enforcement officer, firefighter, ambulance worker, Department of Corrections employee or contractor, health care personnel, or other public officer performing official duties, aggravated assault jumps from a Class 3 felony to a Class 2 felony. The maximum prison term rises to 25 years and the maximum fine to $50,000.⁴³

Habitual Offender Enhancements

Prior felony convictions push the sentencing class up. With one or two prior felony convictions from any jurisdiction, the current offense moves to the next more severe felony class, so aggravated assault becomes a Class 2 felony with the same 25-year, $50,000 ceiling.⁵⁶³

How Long Prosecutors Have to File Charges

The state has seven years from the date of the offense to charge aggravated assault. Only Class A, B, and C felonies carry no time limit, and standard aggravated assault is a Class 3 felony, so it falls inside the seven-year rule.⁷ After the window closes, prosecution is barred regardless of what the evidence shows.

Defenses That Can Apply

Self-Defense and Defense of Others

South Dakota law allows the use or threat of force when you reasonably believe it’s necessary to defend against another person’s imminent unlawful force, and there is no duty to retreat before using force.⁸ One limit is important: this provision covers force “other than deadly force.” Proportionality is almost always the question at trial. Pulling a knife to stop a shove looks very different to a jury than pulling a knife to stop an armed attacker. Defense of others works the same way. The question is whether a reasonable person in your position would have believed the force was necessary to protect someone else.

Mistaken Identity

Bar fights, brawls, and domestic disturbances often involve multiple people, poor lighting, and high emotion. Those are exactly the conditions in which witnesses misidentify who did what. Phone records, alibi witnesses, and security camera footage can undercut the prosecution’s identification.

Constitutional Challenges

If police obtained evidence through an illegal search, coerced a statement, or violated your rights during the investigation, the defense can move to suppress that evidence. A warrantless home entry, for example, is presumed unreasonable under the Fourth Amendment unless an established exception applies. Without key evidence, the prosecution may not be able to meet its burden.

Consequences That Follow You After the Sentence

Firearm Prohibitions

A conviction triggers firearm bans at both the state and federal level. Under South Dakota law, anyone convicted of a crime of violence cannot possess or control a firearm for 15 years from the date of final discharge from prison, jail, probation, or parole. Possession during that period is itself a Class 6 felony.⁹

Federal law goes further. Anyone convicted of a crime punishable by more than one year in prison — a category that includes aggravated assault — is permanently prohibited from possessing firearms or ammunition.¹⁰ When the 15-year state window expires, the federal ban stays in place unless a separate legal remedy restores the right.

Employment and Licensing

A violent felony is among the hardest records to carry through a background check. Many employers in healthcare, education, law enforcement, and finance will not hire applicants with this conviction. Professional licensing boards may deny or revoke licenses based on a violent felony. Outside regulated industries, the record still shows up on standard checks.

No Expungement

South Dakota’s expungement law reaches arrest records when charges were never filed, when a case was dismissed, or when the defendant was acquitted.¹¹ There is no general route to expunge a felony conviction. An aggravated assault conviction stays on the record permanently, which makes every other collateral consequence effectively lifelong.

Housing, Custody, and Immigration

Many landlords screen out applicants with felony records, so housing options shrink. In custody disputes, courts treat a history of violence as a safety concern and may restrict custody or visitation. For non-citizens, aggravated assault is considered a crime of violence under federal immigration law and can trigger deportation or bar future immigration relief regardless of how long the person has lived in the United States.

1
South Dakota Legislature. South Dakota Code 22-18-1.1 – Aggravated Assault Felony
2
South Dakota Legislature. South Dakota Code 22-1-2 – Definitions
3
South Dakota Legislature. South Dakota Code 22-6-1 – Felony Classes and Penalties
4
South Dakota Legislature. South Dakota Code 22-18-1.05 – Simple or Aggravated Assault Against Law Enforcement Officer, Firefighter, Ambulance Personnel, Department of Corrections Employee or Contractor, Health Care Personnel, or Other Public Officer
5
South Dakota Legislature. South Dakota Code 22-7 – Habitual Criminals
6
South Dakota Legislature. South Dakota Code 22-7-8 – Three or More Additional Felony Convictions Including One or More Crimes of Violence Enhancement of Sentence
7
South Dakota Legislature. South Dakota Code 23A-42 – Limitation on Criminal Prosecutions
8
South Dakota Legislature. South Dakota Code 22-18-4 – Force Defense of Person
9
South Dakota Legislature. South Dakota Code 22-14-15 – Possession of Firearm by One With Prior Violent Crime Conviction or Certain Drug Related Conviction Felony Fifteen Year Period
10
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
11
South Dakota Unified Judicial System. Expungement