Illinois Use of Force and Self-Defense Laws

Use of Force Laws in Illinois

Use of Force in Defense of Person

Under 720 ILCS 5/7-1(a), a person is justified in the use of force against another when and to the extent that he or she reasonably believes that such conduct is necessary to defend himself or herself or another against such other's imminent use of unlawful force.

A person is justified in the use of deadly force only if he or she reasonably believes that such force is necessary to:

• Prevent imminent death or great bodily harm to himself/herself or another, or
• Prevent the commission of a forcible felony

Self-Defense Elements

Under Illinois law, self-defense is an affirmative defense. Once raised by the defendant, the State bears the burden of proving beyond a reasonable doubt that the defendant did not act in self-defense, in addition to proving the elements of the offense charged (720 ILCS 5/7-14).

To establish a claim of self-defense, the defendant must present evidence as to each of the following six elements:

1. That unlawful force was threatened against him or her
2. That he or she was not the aggressor
3. That the danger of harm was imminent
4. That the use of force was necessary
5. That he or she actually and subjectively believed a danger existed that required the use of the amount of force applied
6. That his or her beliefs in that regard were objectively reasonable

If the State negates any one of these elements, the defendant's claim of self-defense must be rejected. (People v. Lee, 213 Ill. 2d 218, 225 (2004))

Reasonableness Standard

The key question in self-defense cases is whether the defendant's belief that it was necessary to use deadly force was reasonable under the circumstances (People v. Montes, 263 Ill. App. 3d 680, 690 (1994)).

A person who is thrust into a life-endangering situation is not required to use infallible judgment in deciding whether and how to act to defend himself or herself. Such a requirement would be unreasonable to impose upon a decision that must be made very quickly by a person who is fearful and under great stress. (People v. White, 87 Ill. App. 3d 321, 323 (1980))

It is not necessary that the danger be actually real - only that the facts and circumstances of the case induced a reasonable belief in the defendant that the threatened danger existed. (People v. Motuzas, 352 Ill. 340, 347 (1933))

Use of Force in Defense of Dwelling (Castle Doctrine)

Under 720 ILCS 5/7-2, a person is justified in the use of force when and to the extent that he or she reasonably believes that such conduct is necessary to prevent or terminate another's unlawful entry into or attack upon a dwelling.

A person is justified in the use of deadly force in defense of a dwelling only if:

• The entry is made or attempted in a violent, riotous, or tumultuous manner, and he or she reasonably believes that such force is necessary to prevent an assault upon, or offer of personal violence to, himself/herself or another then in the dwelling, OR
• He or she reasonably believes that such force is necessary to prevent the commission of a felony in the dwelling

Illinois is a Castle Doctrine state. There is no legal duty to retreat if threatened in one's home, and using deadly force may be justified under the circumstances described above.

No Stand Your Ground Law

Illinois does not have a statutory Stand-Your-Ground provision. However, the Illinois Supreme Court has long held that a non-aggressor lawfully in a public place has NO duty to retreat before using force in self-defense - see People v. McGraw, 13 Ill. 2d 249, 256 (1958); People v. Estes, 127 Ill. App. 3d 642 (1984); and Illinois Pattern Jury Instruction, Criminal, No. 24-25.09X. The duty-to-retreat rule applies only in the limited circumstance of an initial aggressor seeking to regain the right of self-defense under 720 ILCS 5/7-4(c). Earlier framings of this section asserting a duty-to-retreat-in-public overstated the rule.

Use of Force in Defense of Other Property

Under 720 ILCS 5/7-3, a person is justified in the use of force when and to the extent that he or she reasonably believes that such conduct is necessary to prevent or terminate another's trespass on or other tortious or criminal interference with either real property (other than a dwelling) or personal property, lawfully in one's possession or in the possession of another who is a member of his or her immediate family or household or of a person whose property one has a legal duty to protect.

A person is justified in the use of deadly force in defense of other property only if he or she reasonably believes that such force is necessary to prevent the commission of a forcible felony.

Liability Protection

In no case shall any act involving the justified use of force give rise to any claim or liability, unless the use of force involves willful or wanton misconduct.

Weapons Considered Legal for Self-Defense in Illinois

• Pepper spray
• Stun guns or tasers (if you possess a valid FOID card)
• Common household items (only if no other weapon is available)
• Firearms (if you meet the legal criteria and have a valid FOID card)

SAFE-T Act Reforms Related to Use of Force

The Illinois Safety, Accountability, Fairness and Equity-Today (SAFE-T) Act includes several reforms related to use of force by law enforcement:

• Mandated body-worn cameras for all police officers
• Limits on military equipment
• Crisis intervention and de-escalation training
• Restrictions on use of force, including the prohibition of chokeholds and other types of neck restraints unless deadly force is authorized

Key Statutory References

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Federal context

N.Y. State Rifle & Pistol Ass'n v. Bruen (2022) and United States v. Rahimi (2024). Bruen, 597 U.S. 1 (2022), established the historical-tradition test for Second Amendment claims. Rahimi, 602 U.S. ___ (2024), then applied Bruen to uphold the federal domestic-violence-restraining-order firearm prohibition at 18 U.S.C. § 922(g)(8), confirming that not every firearm disability fails Bruen's test. Practitioners advising on use of force or firearm-disability questions should be familiar with both cases.