An attempted murder sentence in Illinois starts at 6 to 30 years in prison as a Class X felony, with no possibility of probation. Firearm enhancements add another 15, 20, or 25 years to natural life on top of that base, and if the victim is a police officer or other protected worker, the range jumps to 20 to 80 years. Most people convicted of this offense serve at least 85% of whatever the judge imposes.
The Base Class X Range
Attempted first-degree murder is sentenced as a Class X felony, the most serious felony classification Illinois uses outside of completed first-degree murder itself.1Illinois General Assembly. Illinois Code 720 ILCS 5/8-4 – Attempt The standard range is 6 to 30 years in prison. An extended term pushes that to 30 to 60 years.2Illinois General Assembly. Illinois Code 730 ILCS 5/5-4.5-25 – Class X Felonies Sentence
Probation, conditional discharge, and periodic imprisonment are all unavailable. Illinois law prohibits these alternatives for any Class X conviction.3Illinois General Assembly. Illinois Code 730 ILCS 5/5-5-3 – Disposition A conviction means prison. The court can also impose fines and order restitution.2Illinois General Assembly. Illinois Code 730 ILCS 5/5-4.5-25 – Class X Felonies Sentence
Where a sentence lands within the range turns on the defendant’s criminal history, how much planning was involved, the severity of injuries to the victim, and the aggravating and mitigating circumstances the judge weighs. A first-time offender whose actions caused no physical injury generally receives something closer to the minimum. A defendant with prior violent felonies and a victim who suffered life-threatening wounds should expect a sentence near the top of the range or an extended term.
Firearm Enhancements Drive Most Sentences
Firearms change the math dramatically. When a gun is involved, mandatory time gets added to the base Class X sentence, and the enhancements stack in tiers based on how the weapon was used:
- Armed with a firearm during the offense: 15 years added, even if the gun was never fired.
- Discharging a firearm during the offense: 20 years added.
- Discharging a firearm that causes great bodily harm, permanent disability, permanent disfigurement, or death: 25 years to natural life added.
All three tiers come from the attempt statute itself.1Illinois General Assembly. Illinois Code 720 ILCS 5/8-4 – Attempt In practice, a defendant sentenced to the 6-year minimum on the base charge who carried a firearm during the offense serves a minimum of 21 years. If that defendant fired the weapon and caused serious injury, the floor becomes 31 years and the ceiling can reach life.
These enhancements shape most attempted murder prosecutions in Illinois because most involve firearms. In People v. Taylor, the defendant received 30 years on the base charge for attempted murder of a peace officer plus an additional 20 years for discharging a firearm, for a 50-year sentence.4Supreme Court of Illinois. People v Taylor, 2023 IL 128316
When the Victim Is a Protected Person
Attempting to kill certain victims shifts the entire sentencing range upward. The minimum becomes 20 years and the maximum 80 years for attempted first-degree murder when specific aggravating factors are present. The attempt statute cross-references provisions in the Unified Code of Corrections that identify those factors, including attempted murder of a peace officer, firefighter, or emergency management worker acting in an official capacity.1Illinois General Assembly. Illinois Code 720 ILCS 5/8-4 – Attempt
This 20-to-80-year range replaces the standard Class X range entirely, and firearm enhancements still apply on top of it. A defendant convicted of attempting to kill a police officer while firing a weapon faces a minimum of 40 years — the 20-year base minimum plus a 20-year firearm discharge enhancement — and the ceiling stretches far higher.
How Much of the Sentence Is Actually Served
Illinois’s truth-in-sentencing rules limit sentence credit for anyone convicted of attempted first-degree murder to no more than 4.5 days per month of imprisonment.5Illinois General Assembly. Illinois Code 730 ILCS 5/3-6-3 – Rules and Regulations for Sentence Credit In practice, that means serving roughly 85% of the imposed sentence before becoming eligible for release. A 20-year sentence translates to at least 17 years behind bars.
That is a sharp break from many other Illinois felonies, where defendants can earn day-for-day credit and serve about half. Attempted murder is specifically listed among the offenses subject to restricted credit, alongside crimes like predatory criminal sexual assault of a child and aggravated criminal sexual assault.5Illinois General Assembly. Illinois Code 730 ILCS 5/3-6-3 – Rules and Regulations for Sentence Credit
After the prison term comes 3 years of mandatory supervised release, Illinois’s version of parole.2Illinois General Assembly. Illinois Code 730 ILCS 5/5-4.5-25 – Class X Felonies Sentence Violating the conditions can send someone back to prison. A 20-year sentence really means roughly 17 years in prison followed by 3 years of supervision.
What the Prosecution Has to Prove
Two elements have to be proven to convict someone of attempted first-degree murder under 720 ILCS 5/8-4: the defendant specifically intended to kill another person, and the defendant took a “substantial step” toward carrying out that killing.1Illinois General Assembly. Illinois Code 720 ILCS 5/8-4 – Attempt Without proof of specific intent to cause death, the charge fails even when someone was seriously hurt.
The intent requirement separates attempted murder from crimes like aggravated battery. Firing a gun into a crowd might show recklessness, but prosecutors need evidence the defendant aimed to kill a particular person or acted with the purpose of causing death. Courts look at the totality of circumstances: the type of weapon used, where the blows or shots were directed, statements made before or during the incident, and the nature of any injuries.
The substantial step requirement filters out people who merely think about committing a killing or make vague plans. In People v. Terrell, the Illinois Supreme Court upheld an attempt conviction where the defendant was found hiding near a business with a loaded revolver and a stocking mask, waiting for it to open. Possessing the tools of the crime near the planned location was enough to cross the line from preparation into attempt.6Justia. People v Terrell, 99 Ill 2d 427 Buying a weapon alone might not qualify. Buying a weapon, driving to the victim’s home, and waiting outside likely would.
Defenses and Mitigation
Given the stakes, defense strategy usually targets one of the two required elements or focuses on reducing the sentence within the range.
Attacking Specific Intent
The most common defense goes at intent. Proving that someone meant to kill, rather than to hurt or scare, is the prosecution’s heaviest burden. A defendant might argue that their actions were reckless or driven by anger in the moment, not aimed at causing death. Shooting at someone’s legs during a fight, for instance, can support an argument that the defendant intended to injure but not kill. That doesn’t excuse the conduct, but it can reduce the charge to aggravated battery or another offense with substantially lower penalties.
Where the weapon was aimed, how many times the defendant struck or fired, whether the defendant said anything indicating a desire to kill, and whether the defendant stopped voluntarily or was interrupted all factor into the analysis.
Disputing the Substantial Step
Even where intent existed, the defense may argue the defendant’s actions never crossed from preparation into a substantial step. Under Terrell, the conduct has to strongly confirm the criminal intent through things like possessing weapons near the planned crime scene, lying in wait, or reconnoitering the location.6Justia. People v Terrell, 99 Ill 2d 427 A defendant who bought a gun and researched the victim’s schedule but never went to the victim’s location has a stronger argument than one arrested outside the victim’s home.
Mitigation at Sentencing
When a conviction looks likely, focus shifts to mitigation. Judges have discretion within the statutory ranges and consider mental health, history of trauma or abuse, age, role in the offense (a secondary participant may receive less time than the person who pulled the trigger), and genuine remorse. A defendant with documented mental illness may argue diminished capacity, asserting that a psychological condition impaired the ability to form specific intent to kill. This rarely produces an acquittal on its own, but it can move a sentence within the range.
A Note on Federal Charges
Most attempted murder cases in Illinois are prosecuted under state law. Federal jurisdiction applies when the crime occurs on federal land, a military installation, or within the special maritime and territorial jurisdiction of the United States. Under 18 U.S.C. § 1113, federal attempted murder carries up to 20 years in prison, a fine, or both.7Office of the Law Revision Counsel. 18 USC 1113 – Attempt to Commit Murder or Manslaughter Federal charges can also arise when the target is a federal official, when the offense involves interstate activity, or when it connects to other federal crimes like drug trafficking or terrorism. Federal sentencing follows its own guidelines and does not use the Illinois Class X framework.