By: W. Scott Hanken | Former Sangamon County Prosecutor | Springfield Criminal Defense & Violent Crimes Defense Attorney | Voted “Best Attorney” — Illinois Times Best of Springfield & State Journal-Register Reader’s Choice | Springfield, IL | Sangamon County | (217) 544-4057 | hankenlaw.com

Yes. Illinois law allows you to use a weapon, including a gun, to defend yourself or another person. But using a weapon usually means using deadly force, and deadly force has a higher bar. You must reasonably believe it is necessary to prevent imminent death, great bodily harm, or a forcible felony.

That rule comes from 720 ILCS 5/7-1, and it applies wherever you are: at home, in your car, or in a parking lot. If you did not start the confrontation, Illinois does not require you to retreat first. It also does not require you to match the attacker weapon for weapon.

Key Takeaways:

• A gun, knife, or bat used in a way likely to kill or seriously injure someone is deadly force. It is justified only against a threat of imminent death, great bodily harm, or a forcible felony.
• Illinois has no “equal force” rule. The question is what you reasonably believed was necessary at that moment.
• If you did not start the fight, you have no duty to retreat, in public or at home.
• Self-defense justifies the force you used. It does not, by itself, excuse carrying a gun you were not allowed to carry.
• Once you raise self-defense, the State must disprove it beyond a reasonable doubt.

What Does Illinois Law Say About Using a Weapon in Self-Defense?

Illinois has no separate self-defense statute for weapons. The same rule applies whether you used your fists, a knife, or a handgun. What changes is the kind of force.

Statute Callout — 720 ILCS 5/7-1(a) (Use of force in defense of person)

“A person is justified in the use of force against another when and to the extent that he reasonably believes that such conduct is necessary to defend himself or another against such other’s imminent use of unlawful force. However, he is justified in the use of force which is intended or likely to cause death or great bodily harm only if he reasonably believes that such force is necessary to prevent imminent death or great bodily harm to himself or another, or the commission of a forcible felony.”

The first sentence covers ordinary force, such as a shove, a punch, or pulling free of someone’s grip. The second sentence governs most weapon cases. It sets a higher bar for force “intended or likely to cause death or great bodily harm,” usually called deadly force.

The Illinois Supreme Court has laid out six elements of self-defense in People v. Gray, 2017 IL 120958, ¶ 50:

1. Unlawful force was threatened against you.
2. You were not the aggressor.
3. The danger was imminent.
4. The force you used was necessary.
5. You actually believed a danger existed that required that force.
6. Your belief was objectively reasonable.

The State defeats self-defense by disproving any one of them.

When Does Using a Weapon Count as Deadly Force?

Deadly force is any force intended or likely to cause death or great bodily harm. The statute does not list weapons, so what matters is how the weapon was used, not just what it was. Shooting at a person is the clearest example. So is stabbing someone or swinging a bat at a person’s head. A weapon used in a way unlikely to cause serious injury may be judged under the ordinary-force standard instead, but that is a fact question the State will contest.

When Can You Use Deadly Force in Illinois?

Only when you reasonably believe it is necessary to prevent one of three things:

• Imminent death to you or another person.
• Imminent great bodily harm to you or another person.
• The commission of a forcible felony.

What is a forcible felony?

Forcible felonies are defined in 720 ILCS 5/2-8. The list includes murder, criminal sexual assault, robbery, burglary, residential burglary, arson, and kidnapping. It ends with a catch-all: any other felony that involves the use or threat of physical force or violence against any individual.

What does “imminent” mean?

It means the danger is about to happen, not that it might happen later. A threat to “get you later” does not justify pulling a gun now. Once an attacker is walking away, running off, or down and disarmed, the danger is no longer imminent, and continuing to use force is no longer self-defense.

Does the attacker have to be armed too?

No. The statute asks what you reasonably feared, not what the other person was holding. An unarmed attacker can pose a real threat of great bodily harm, such as several people beating one person, or a much larger attacker pinning someone down and striking his head. A single shove or punch in an argument, however, will rarely justify a gun or a knife.

Does the Force Have to Match the Threat?

Not in the way most people think. Illinois has no equal-force or equal-weapon rule. You do not have to wait for an attacker to draw a knife before you draw yours. The test is whether you reasonably believed the force you used was necessary.

The idea of proportion still matters in two ways:

• Deadly force against a non-deadly threat fails. If the threat was a push or a slap, a reasonable person would not believe deadly force was necessary.
• Force after the threat ends fails. A shot fired at someone who has turned and run is not necessary, and it is the kind of fact prosecutors build cases around.

Do You Have to Retreat Before Using a Weapon in Illinois?

No, if you did not start the confrontation, and that is true in public as well as at home. Illinois has no stand-your-ground statute. It also has no general duty to retreat for someone who did not start the fight.

The Illinois Pattern Jury Instructions include a no-duty-to-retreat instruction, IPI Criminal No. 24-25.09X. It tells jurors that a person who did not initially provoke the use of force has no duty to try to escape before using force against the aggressor.

A court gives that instruction only when the evidence supports it. In People v. Sloan, 2024 IL 129676, the Illinois Supreme Court upheld a trial court’s refusal to give it where no evidence showed the other man was the initial aggressor.

Whether you could have walked away can still come up at trial. Prosecutors may argue it shows force was not necessary. That is an argument about necessity, not a legal duty to retreat.

The rule changes if you started it. Under 720 ILCS 5/7-4, someone who provoked the use of force generally loses self-defense. There are two narrow exceptions:

• The other person’s response was so great that you reasonably believed you faced imminent death or great bodily harm, and you had exhausted every reasonable means of escape.
• You withdrew in good faith, clearly told the other person you wanted to stop, and the other person kept attacking or started again.

Neither exception is available to someone who provoked the fight as an excuse to hurt the other person, or who was committing a forcible felony.

Can You Use a Weapon to Defend Your Home?

Yes. Illinois’ version of the castle doctrine is 720 ILCS 5/7-2. It allows force you reasonably believe is necessary to prevent or stop someone’s unlawful entry into or attack on your dwelling. Deadly force is justified in two situations:

• The entry is made or attempted in a violent, riotous, or tumultuous manner, and you reasonably believe deadly force is necessary to prevent an assault on, or personal violence to, you or someone else in the home.
• You reasonably believe deadly force is necessary to prevent a felony in the dwelling.

Section 7-2 does not presume that an intruder means to hurt you. Your belief must still be reasonable, and the circumstances of the entry matter.

A “dwelling” under 720 ILCS 5/2-6 is a building or part of a building, a tent, a vehicle, or another enclosed space used or intended for use as a home or residence. Your yard, driveway, or a detached shed is not the dwelling itself, so the stricter property rules below generally apply there.

Does the castle doctrine cover my car?

Usually not. A car is a dwelling only if someone uses it as a place to live. But Section 7-1 still protects you in your car, and so does the no-duty-to-retreat rule. An attempt to take your car by force can itself be a forcible felony.

Can You Use a Weapon to Protect Your Property?

Only in limited ways. Under 720 ILCS 5/7-3, you may use reasonable force to stop someone from trespassing on or interfering with property you lawfully possess (other than your home). You may use deadly force only if you reasonably believe it is necessary to prevent a forcible felony.

Ordinary theft is not a forcible felony. Shooting at someone running off with a bike from your driveway is not justified. Neither is firing at a thief who is already leaving, because nothing is imminent anymore.

Does Self-Defense Protect You From Gun Charges?

Not automatically. Self-defense justifies the force you used. In most cases it does not justify having a gun you were not legally allowed to have, or carrying it where you were not allowed to carry it.

If you had no FOID card under the Firearm Owners Identification Card Act (430 ILCS 65), or you carried in public without a license under the Firearm Concealed Carry Act (430 ILCS 66), prosecutors can still file weapons charges. The same is true if you were legally barred from possessing a gun. Those charges include aggravated unlawful use of a weapon under 720 ILCS 5/24-1.6, and they can be filed even when the shooting itself was justified.

There is a narrow exception for a gun you grabbed only because you were attacked. In People v. Crowder, 2018 IL App (1st) 161226, the appellate court reversed an aggravated unlawful use of a weapon conviction. The defendant had briefly taken his father’s legally owned handgun after three men attacked them without provocation. That reasoning turns on possession forced by the emergency. It does not help someone who was already carrying a gun unlawfully before the confrontation began.

What Charges Can Follow a Self-Defense Incident Involving a Weapon?

Self-defense can be raised against each force-based charge on this list.

What about a warning shot?

A warning shot is still a discharge. Firing into the air or the ground can be charged as reckless discharge of a firearm, a Class 4 felony, when it endangers someone. Firing during a confrontation can be charged as aggravated assault by discharging a firearm, also a Class 4 felony. It is not a legally “safer” option than the alternatives.

What if I only showed the gun?

Displaying or pointing a weapon to make someone back off can be charged as aggravated assault under 720 ILCS 5/12-2(c)(1). Self-defense can apply to that charge too. It turns on the same questions: an imminent threat, necessity, and whether your belief was reasonable.

What Happens if a Jury Finds Your Belief Was Honest but Unreasonable?

It depends on the charge.

• Murder: An honest but unreasonable belief in the need for deadly force reduces first degree murder to second degree murder under 720 ILCS 5/9-2(a)(2). The defendant must prove that mitigating factor by a preponderance of the evidence.
• Attempted murder: In People v. Guy, 2025 IL 129967, the Illinois Supreme Court held that attempted first degree murder requires an intent to kill without lawful justification. A jury’s finding that the defendant actually believed he needed to defend himself could not stand alongside that conviction. The Court entered a conviction for aggravated battery with a firearm instead, a Class X felony.
• Aggravated battery, aggravated assault, and other charges: There is no partial defense. An unreasonable belief defeats self-defense, and the charge stands.

Who Has to Prove Self-Defense in Illinois?

You do not. Self-defense is an affirmative defense under 720 ILCS 5/7-14. You need only some evidence to raise it, and that evidence can come from your own testimony, a witness, or video. Once it is raised, 720 ILCS 5/3-2 requires the State to disprove it beyond a reasonable doubt, along with every element of the charge.

What Should You Do After Using a Weapon in Self-Defense?

• Call 911. Report that you were attacked and ask for medical help for anyone who is hurt.
• Secure the weapon and follow officers’ commands. Do not be holding a weapon when police arrive.
• Keep your statement short. Say you were the one attacked, then tell officers you want to speak with a lawyer before answering detailed questions.
• Preserve the evidence. Save video, photos of injuries, the names of witnesses, and any messages showing prior threats.

In weapon cases, the first police report often becomes the State’s version of who the aggressor was. What you say in the first hour matters.

Frequently Asked Questions (FAQs)

Further Reading

Practice Area

• Violent Crimes Defense

Related Articles

• When Is Self-Defense a Legitimate Defense to Battery Charges? — Read this if there was a fight but no weapon.
• Defend Against Assault Charges by Arguing Self Defense — Read this if you were charged for a threat rather than contact.
• 4 Ways to Boost a Defense Against Aggravated Battery Charges — Self-defense is one option; this covers the others when a weapon makes the charge a felony.
• Murder vs. Manslaughter in Illinois: What the Charges Really Mean — Explains second degree murder, the one place an unreasonable belief reduces the charge.
• Federal Gun Deregulation Won’t Save You From an Illinois Weapons Charge — Read this if the gun itself is part of the charge.
• Can You Carry a Firearm in Your Vehicle in Illinois? — Read this if you keep a gun in your car for protection.

Browse by Topic

• Violent Crimes Defense
• Self-Defense
• Firearms / Gun Charges
• Aggravated Battery

Ready to Fight Your Violent Crime Charge in Springfield?
Call W. Scott Hanken at (217) 544-4057 or contact us online for a free consultation. We serve clients throughout Springfield, Sangamon County, and Central Illinois.

About the Author: W. Scott Hanken, Attorney at Law
Scott Hanken is a Springfield, Illinois criminal defense attorney with over 37 years of experience, including service as a former Sangamon County prosecutor. He has been voted Best Attorney by the Illinois Times and State Journal-Register, holds an Avvo 10.0 “Superb” rating, and has earned over 270 five-star Google reviews. He serves clients throughout Sangamon County and Central Illinois.

📍 1100 S 5th St, Springfield, IL 62703 | ☎ (217) 544-4057 | 🌐 hankenlaw.com

This article is for general educational purposes only and does not constitute legal advice. Every case is unique — contact an experienced Springfield criminal defense attorney for guidance on your specific situation.

By: W. Scott Hanken | Former Sangamon County Prosecutor | Springfield Criminal Defense & Violent Crimes Defense Attorney | Voted “Best Attorney” — Illinois Times Best of Springfield & State Journal-Register Reader’s Choice | Springfield, IL | Sangamon County | (217) 544-4057 | hankenlaw.com

In Illinois, self-defense is a complete defense to battery if you reasonably believed force was necessary to stop someone’s imminent unlawful force and you were not the aggressor. You only need some evidence to raise it. The State must then disprove it beyond a reasonable doubt.

The statute is 720 ILCS 5/7-1. The Illinois Supreme Court listed its six elements in People v. Gray, 2017 IL 120958, an aggravated domestic battery case.

The six self-defense elements (720 ILCS 5/7-1; People v. Gray, 2017 IL 120958, ¶ 50)

1. Unlawful force was threatened against you.
2. You were not the aggressor.
3. The danger was imminent.
4. The force you used was necessary.
5. You actually and subjectively believed the danger required that force.
6. That belief was objectively reasonable.

The rule: the State defeats self-defense by disproving any one element beyond a reasonable doubt.

Bottom Line: Self-defense does not reduce a battery charge. It defeats it. The State can overcome self-defense only by disproving at least one of the six elements beyond a reasonable doubt. If it cannot do that, the verdict is not guilty. It works only when the facts fit: an imminent threat, unlawful force coming at you, a reasonable response, and you did not start the fight. In Sangamon County, most self-defense battery cases turn on one question: who was the aggressor?

What Counts as Battery in Illinois?

Battery is knowingly causing bodily harm to someone, or knowingly making physical contact of an insulting or provoking nature, without legal justification. That is 720 ILCS 5/12-3. The words “without legal justification” matter. Self-defense is legal justification, which is why a valid self-defense claim defeats the charge entirely.

Self-defense applies the same way to all three charges. The elements do not change with the charge.

When Is Self-Defense a Valid Defense to Battery in Illinois?

Self-defense is valid when you reasonably believed force was necessary to protect yourself or another person from someone’s imminent use of unlawful force.

Statute Callout — 720 ILCS 5/7-1(a) (Use of force in defense of person)

“A person is justified in the use of force against another when and to the extent that he reasonably believes that such conduct is necessary to defend himself or another against such other’s imminent use of unlawful force. However, he is justified in the use of force which is intended or likely to cause death or great bodily harm only if he reasonably believes that such force is necessary to prevent imminent death or great bodily harm to himself or another, or the commission of a forcible felony.”

In People v. Gray, 2017 IL 120958, ¶ 50, the Illinois Supreme Court restated the elements in these words: “(1) unlawful force threatened against a person, (2) the person threatened was not the aggressor, (3) the danger of harm was imminent, (4) the use of force was necessary, (5) the person threatened actually and subjectively believed a danger existed that required the use of the force applied, and (6) the beliefs of the person threatened were objectively reasonable.”

Gray was reciting settled law. The same six elements appear in People v. Lee, 213 Ill. 2d 218, 224-25 (2004), a case that came out of Sangamon County Circuit Court.

If the State disproves any one of those six, the defense fails (Gray, ¶ 50; Lee, 213 Ill. 2d at 225). That is why a self-defense case usually comes down to a single contested element rather than all six.

Who Has to Prove Self-Defense in an Illinois Battery Case?

You do not have to prove self-defense. You only need some evidence to raise it. Once you do, the State must disprove it beyond a reasonable doubt, along with every element of the battery charge.

Self-defense is an affirmative defense under 720 ILCS 5/7-14, and 720 ILCS 5/3-2 sets the burden. Unless the State’s own evidence raises the issue, you must present some evidence of self-defense. Once it is raised, the burden shifts to the State.

The threshold is low. Slight evidence entitles you to a self-defense instruction (People v. Everette, 141 Ill. 2d 147 (1990)). Your own testimony can supply it, and so can a witness, a video, or the State’s own police report. After that, the credibility fight belongs to the judge or jury (Gray, ¶ 51).

Does My Force Have to Match the Force Used Against Me?

Not exactly. Illinois does not require an equal weapon or an equal blow. It requires force that you reasonably believed was necessary to stop the threat.

The statute draws one hard line, and it is between ordinary force and deadly force. You may use ordinary force when you reasonably believe it is necessary to defend against imminent unlawful force. You may use force likely to cause death or great bodily harm only if you reasonably believe it is necessary to prevent imminent death or great bodily harm, or the commission of a forcible felony (720 ILCS 5/7-1). The question is what you reasonably feared, not what the attacker happened to be holding.

A forcible felony, defined in 720 ILCS 5/2-8, includes offenses such as robbery, burglary, residential burglary, kidnaping, criminal sexual assault, and aggravated battery resulting in great bodily harm or permanent disability or disfigurement, plus any other felony involving the use or threat of physical force or violence against an individual.

Force beyond what was necessary defeats the defense. If you knocked someone down and then kept hitting him after the threat ended, the State will argue that the later blows were not necessary and your belief was not reasonable. Those are the fourth and sixth elements in Gray.

Do I Have to Retreat Before Defending Myself in Illinois?

No. If you did not start the fight, Illinois does not require you to walk away before using force. Whether you could have left still matters to whether the force was necessary.

Illinois has no stand-your-ground statute. The no-retreat rule comes from case law and the Illinois Pattern Jury Instructions, which include a no-duty-to-retreat instruction, IPI Criminal No. 24-25.09X.

A court gives that instruction only when the evidence supports it. In People v. Sloan, 2024 IL 129676, the Supreme Court held the trial court did not abuse its discretion in refusing IPI Criminal No. 24-25.09X where the evidence did not support giving a no-duty-to-retreat instruction.

What if I Started the Fight?

Usually you lose the defense. An initial aggressor can claim self-defense only after the other person escalates to deadly force or after a clear, good-faith withdrawal from the fight.

720 ILCS 5/7-4 makes self-defense unavailable to anyone who is committing or escaping from a forcible felony, or who provokes force as an excuse to hurt someone.

An initial aggressor gets two narrow ways back:

• Escalation: The other person’s response became so great that you reasonably believed you faced imminent death or great bodily harm, and you exhausted every reasonable means of escape other than deadly force.
• Withdrawal: You withdrew from the fight in good faith, clearly told the other person you wanted to stop, and the other person kept attacking or started again.

A shove followed by a beating is the classic escalation case. A shouting match where you threw the first punch is not.

What if the Other Person Only Threatened Me With Words?

Words alone rarely justify a physical response. The threat must be imminent, meaning force about to be used, not a threat about the future (Gray, ¶ 50). “I’m going to kick your butt” from across a parking lot is different from the same words said by someone closing the distance with his fists raised. The words matter less than what the person was doing when he said them.

What if I Was Defending Someone Else?

Illinois protects that too. Section 7-1 justifies force “to defend himself or another,” so the same six elements apply when you step in to protect a friend, a family member, or a stranger. The question is whether you reasonably believed the other person faced imminent unlawful force.

What if the Person I Fought Was a Police Officer?

Different rules apply. Under 720 ILCS 5/7-7, you may not use force to resist an arrest you know is being made by a peace officer, even if you believe the arrest is unlawful and even if it actually is. Self-defense against an officer’s use of excessive force is a separate question that depends heavily on the facts. Section 7-7 bars resisting the arrest itself; it is not a blanket ban on defending against force that has already become unlawful. It is the kind of case where you need a lawyer before you say anything.

What if It Happened in My Home?

Illinois gives extra protection inside your dwelling. Under 720 ILCS 5/7-2, you may use force you reasonably believe is necessary to prevent or stop someone’s unlawful entry into or attack on your home. Deadly force is justified in two situations:

• The entry was made or attempted in a violent, riotous, or tumultuous manner, and you reasonably believed deadly force was necessary to prevent an assault upon, or offer of personal violence to, you or another person then in the dwelling.
• You reasonably believed deadly force was necessary to prevent a felony in the dwelling.

Is There an “Imperfect Self-Defense” That Reduces a Battery Charge?

No. Illinois recognizes an honest but unreasonable belief in self-defense only in murder cases, where it reduces the charge to second degree murder. On a battery charge, an unreasonable belief simply defeats the defense.

This is one of the most common misunderstandings about Illinois self-defense law. The unreasonable-belief rule appears in only one statute: second degree murder, 720 ILCS 5/9-2(a)(2). There, it reduces first degree murder to second degree murder, and the defendant must prove the mitigating factor by a preponderance of the evidence. The Supreme Court has refused to extend that concept even to attempted murder. It held in People v. Lopez, 166 Ill. 2d 441 (1995) that attempted second degree murder does not exist in Illinois.

On a battery or aggravated battery charge, an unreasonable belief fails the sixth element in Gray, and the self-defense claim fails with it. The facts can still matter at sentencing. The judge must consider whether there were substantial grounds tending to excuse or justify your conduct under 730 ILCS 5/5-5-3.1(a)(4). That is mitigation, not a defense.

If you are weighing whether your facts support self-defense, call W. Scott Hanken, Attorney at Law at (217) 544-4057. The answer usually depends on details that disappear within days: video, witnesses, and injury photos.

What Evidence Helps a Self-Defense Claim in Sangamon County?

Self-defense cases are won on proof of who started it and what the threat looked like at that moment. Useful evidence includes:

• Surveillance, doorbell, or cell phone video, preserved before it is overwritten.
• Photos of your injuries taken the same day, along with medical records.
• Witnesses who saw the start of the fight, not just the end.
• Texts or messages showing prior threats from the other person.
• 911 calls, including whether you were the one who called.
• The other person’s prior violence toward you, when the law allows it to be introduced.

What does not help is a statement to police given in the moment without a lawyer. In Springfield battery cases, the police report often becomes the State’s first exhibit on who the aggressor was.

Frequently Asked Questions (FAQs)

Further Reading

Practice Area

• Violent Crimes Defense

Related Articles

• The Difference Between Assault and Battery in Illinois — Not sure whether you are facing an assault charge or a battery charge? Start here.
• Defend Against Assault Charges by Arguing Self Defense — Charged with assault rather than battery? This covers how self-defense applies to that charge.
• 4 Ways to Boost a Defense Against Aggravated Battery Charges — Self-defense is one option; this covers the others when the charge is a felony.
• Can You Use a Weapon in Self-Defense? — If a weapon was involved, this covers when using one can still be self-defense.
• Murder vs. Manslaughter in Illinois: What the Charges Really Mean — Explains second degree murder, the one place Illinois recognizes “imperfect” self-defense.
• Charged With Disorderly Conduct in Springfield? Here’s What 720 ILCS 5/26-1 Actually Means For You — Many Springfield scuffles are charged as disorderly conduct instead of, or alongside, battery.

Browse by Topic

• Violent Crimes Defense
• Self-Defense
• Battery
• Aggravated Battery

Ready to Fight Your Violent Crime Charge in Springfield?

Call W. Scott Hanken at (217) 544-4057 or contact us online for a free consultation. We serve clients throughout Springfield, Sangamon County, and Central Illinois.

About the Author: W. Scott Hanken, Attorney at Law

Scott Hanken is a Springfield, Illinois criminal defense attorney with over 37 years of experience, including service as a former Sangamon County prosecutor. He has been voted Best Attorney by the Illinois Times and State Journal-Register, holds an Avvo 10.0 “Superb” rating, and has earned over 270 five-star Google reviews. He serves clients throughout Sangamon County and Central Illinois.

📍 1100 S 5th St, Springfield, IL 62703 | ☎ (217) 544-4057 | 🌐 hankenlaw.com

This article is for general educational purposes only and does not constitute legal advice. Every case is unique — contact an experienced Springfield criminal defense attorney for guidance on your specific situation.