Criminal Nuggets...

Kane County State's Attorney Podcast

What Is Involuntary Manslaughter?

February 14, 2020 By Samuel Partida, Jr.

In Illinois involuntary manslaughter is an unintentional killing. It results when a person acts recklessly such that their conduct leads to the death of another individual.

What’s The Difference Between Involuntary Manslaughter And First Degree Murder?

First-degree murder requires an intentional or knowing act that creates a strong probability of death or great bodily harm. 720 ILCS 5/9-1(a)(1).

Involuntary manslaughter requires reckless conduct that is likely to cause death or great bodily harm to an individual. 720 ILCS 5/9-3(a).

The difference between involuntary manslaughter and first-degree murder is the mental state accompanying the act that causes the victim’s death.

Involuntary Manslaughter Illinois Statue

Note: In Illinois involuntary manslaughter and reckless homicide are essentially the same thing. A reckless homicide just involves a motor vehicle.

Involuntary Manslaughter in Illinois is listed under 720 ILCS 5/9-3(a). It says,

A person who unintentionally kills an individual without lawful justification commits involuntary manslaughter if his acts whether lawful or unlawful which cause the death are such as are likely to cause death or great bodily harm to some individual, and he performs them recklessly, except in cases in which the cause of the death consists of the driving of a motor vehicle…”

720 ILCS 5/9-3(a)

Involuntary Manslaughter Example

Take, for instance, this real life example. In the real case the kid did not die. But her friend did think it would be funny to push her friend off a bridge.

example of involuntary manslaughter - standing over a bridge
friend pushes victim involuntary manslaughter illinois example
Victim falls involuntary example recklessness
victim hits the water involuntary manslaughter example

Not the smartest thing to do in the world. Had the person who was pushed off the bridge died we’d have an involuntary manslaughter on our hands.

The friend was just trying to be funny.

She had no intent to harm nor did she knowingly harm her friend. Nonetheless, pushing someone off a bridge is pretty reckless. The mental state for an involuntary manslaughter in Illinios is recklessness.

Involuntary Manslaughter Sentence

Involuntary manslaughter is a Class 3 Felony. See the chart below and learn more about Class 3 Felonies in Illinois.

ClassSentencing RangeExtended Term
(if eligible)
Class M20-60 years60-100 years
Class X6-30 years30-60 years
Class 14-15 years15-30 years
Class 23-7 years7-14 years
Class 32-5 years5-10 years
Class 41-3 years3-6 years

Involuntary Manslaughter Can Be A Lesser Included Offense Of Murder

involuntary manslaughter in Illinois
Involuntary manslaughter as a lesser included offense.

People v. Smith, 2014 IL App (1st) 103436 (July). Episode 011 (Duration 9:46).

Involuntary manslaughter as a lesser included offense to murder, is legally possible. However, I doubt that is very common. This case is an example of that.

The Facts

Defendant shot his girlfriend’s husband.

Defendant testified that he entered the home late at night when he was not invited. But they pulled a gun on him. Defendant had to wrestle it away. Husband ended up shot in the chest when the gun just “went off” during the struggle.

The State’s Evidence Was Different

The State’s Evidence Showed –

  • All bullets fired hit a victim
  • Victims were naked and defenseless
  • Defendant burst into their bedroom
  • Defendant broke the phone
  • Defendant took the gun
  • Defendant ran from police
  • Defendant lied about his name

Judge’s Decision To Grant Instructions On Involuntary Manslaughter

To win an involuntary manslaughter as a lesser included offense to murder instruction, the judge is going to look at the facts and decide if an act of recklessness was described somewhere in the proofs.

The court will look at these factors that establish recklessness –

  • The brutality and duration of the offense
  • The severity of the victim’s injuries
  • The disparity in size between the defendant and the victim
  • Whether the defendant used a weapon, and
  • Whether the defendant struck multiple times

Involuntary Manslaughter As A Lesser Included Offense

In this case, the dense was walking a very narrow tightrope when betting that they would qualify for the involuntary manslaughter instruction.

They didn’t make it.

The Legal Lesson

Just because one can theoretically win a lesser included on the thinnest of evidence, it does not mean that we actually will get it.

The more inconsistent a defendant’s testimony is with a theory of a reckless killing the less likely the instruction will be won.

A defendant who is adamant about proceeding with a claim of self defense has to be counseled on what may be given up.

See Also The Other Illinois Homicide Statutes

  • The Illinois Homicide Statute
  • What Is First Degree Murder?
  • What Is Felony Murder?
  • What Is Second Degree Murder?
  • What Is Reckless Homicide?

Filed Under: Lesser-Included, Second Degree Murder

Where’s Samuel Partida, Jr.?

Samuel Partida, Jr.Samuel Partida, Jr. is now prosecuting criminal law cases in an Illinois county near you. He is, therefore, unavailable to answer questions on this site. Always remember, there is no substitute for steady, persistent attention to the cases.

FREE SPECIAL REPORT
For Illinois Police Officers & Lawyers.

Free Printed Edition
The Ultimate Police Guide To A Legal Car Search…

Illinois Search & Seizure Guide For Police

Catch Up Quickly With
Everything You Missed
In Car Search Law!

Click here to claim your FREE car search guide.

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Categories

  • Accountability
  • Appeal
  • Bail
  • Charges
    • Aggravated Assault
    • Aggravated Battery
    • Armed Habitual Criminal
    • Battery
    • Burglary
    • Controlled Substance
    • Criminal Damage
    • Disorderly Conduct
    • Leaving The Scene
    • Mob Action
    • Theft
    • Vehicular Hijacking
  • Conceal and Carry
  • Confession
    • Attenuation
    • Miranda
  • Constitutional
  • Contempt Of Court
  • Criminal Possession
  • Discovery
  • Dismissal
  • Double Jeopardy
  • DUI
    • Actual Physical Control
    • Blood
    • Breathalyzer
    • Suspension
  • Evidence
    • Expert
    • Eyewitness
    • Other Crimes
    • Over Hear
    • Prior Consistent Statement
    • Prior Inconsistent Statement
  • Expungement
  • Felony Murder
  • Forfeiture
  • Illinois Gun Crimes
    • Armed Violence
    • Reckless Discharge
    • UUW
  • Immigration
  • Indictment
  • Ineffective Assistance
    • Krankel Hearing
  • Judicial Bias
  • Jury Instructions
  • Lesser-Included
  • Mental State
    • Knowing
  • Notice Requirement
  • Professional Responsibility
    • Conflict Of Interest
  • Prosecutorial Misconduct
  • Reasonable Doubt
  • SCOTUS
  • Search & Seizure
    • Anonymous Tip
    • Consent To Search
    • Drug Dog
    • Good Faith Exception
    • Mistake of Law
    • Pat Down
    • Plain View
    • Probable Cause
    • Traffic Stop
    • Warrant
  • Second Degree Murder
  • Sentencing
    • Credit For Time Served
    • Fines & Fees
    • Forcible Felony
  • Sex Case
    • SORA
  • Structural Error
  • Trial
    • Batson
    • Closing Argument
    • Insanity Defense
    • Pretrial Publicity
    • Self Defense
    • Speedy Trial
  • Podcast
    • Criminal Nuggets
    • Police Nuggets
    • Premium Nuggets
  • More
    • Start Here
    • About
    • More CLE
    • Illinois Search And Seizure
    • Police Car Search Guide
    • Illinois DUI Law
    • Illinois Crimes Index
    • Illinois Sentencing Checklist
  • Login

© 2025 · For internal training and education · Disclaimer