Former Cook County Felony Prosecutor
Unlawful Possession of a Weapon by a Felon Lawyer Chicago
Experienced Chicago Criminal Defense Attorney Defending Felon in Possession Gun Charges
Unlawful Possession of a Weapon by a Felon is one of the most aggressively prosecuted gun crimes in Illinois. Convicted felons who are accused of possessing a firearm or ammunition face severe penalties, including mandatory prison sentences, substantial fines, felony convictions, and the possibility of Class X felony charges in certain situations.
Cook County prosecutors treat felon unlawful possession cases as high-priority prosecutions and frequently seek incarceration even when the defendant has been law-abiding for years following a prior felony conviction.
If you have been charged with unlawful possession of a weapon by a felon, early legal representation is critical. An experienced criminal defense attorney can investigate the facts, preserve evidence, challenge police conduct, and develop a defense strategy before prosecutors gain momentum.
Andrew M. Weisberg is a former Cook County prosecutor and experienced Chicago criminal defense attorney who has successfully defended clients charged with unlawful possession, armed habitual criminal offenses and other serious weapons charges throughout Cook County, DuPage County, Lake County, and the surrounding area.
Understanding Unlawful Possession of a Weapon by a Felon Under Illinois Law
Under 720 ILCS 5/24-1.1, unlawful possession of a weapon by a felon occurs when a person who has previously been convicted of a felony knowingly possesses a firearm or firearm ammunition.
To obtain a conviction, the prosecution must prove beyond a reasonable doubt:
- The defendant has a prior felony conviction
- The defendant knowingly possessed a firearm or ammunition
- The possession occurred in Illinois
The prosecution must prove both the prior felony conviction and possession. Failure to prove either element requires acquittal.
Many people are surprised to learn that the statute applies even when:
- The firearm is unloaded
- The firearm belongs to another person
- The firearm is never used
- The possession is temporary
- The firearm is stored inside a residence
- The firearm is found inside a vehicle
Illinois gun laws are among the strictest in the country, and prosecutors frequently pursue these cases aggressively.
Possession Does Not Mean Ownership
One of the most important issues in many gun cases is possession.
Illinois law recognizes both actual possession and constructive possession.
Actual Possession
Actual possession generally means the firearm was found directly on the person.
Examples include:
- Inside a pocket
- In a waistband
- In a backpack being carried
- In a purse
- On the person’s body
Constructive Possession
Constructive possession is often more difficult for prosecutors to prove.
The State must establish that the defendant:
- Knew the firearm existed
- Exercised control over it
Common constructive possession allegations involve firearms found:
- Under a vehicle seat
- Inside a glove compartment
- Inside a shared residence
- Inside a bedroom
- Inside a closet
- Inside a gym bag
Simply being near a firearm does not automatically establish possession.
Many unlawful possession cases are successfully challenged because the prosecution cannot prove knowledge or control.
Possession of Ammunition Alone
Illinois law also prohibits convicted felons from possessing ammunition and unlawfully possessed firearms.
Many defendants are surprised to learn that ammunition alone can result in felony charges.
Examples include:
- Ammunition discovered during a traffic stop
- Ammunition found during a search warrant execution
- Ammunition located in a home
- Ammunition found in a glove compartment
- Ammunition discovered in storage containers
Even when no firearm is recovered, prosecutors may still file charges.
Penalties for Unlawful Possession of a Weapon by a Felon
Class 3 Felony
Most first-time felon unlawful possession cases are charged as a Class 3 felony.
Potential penalties include:
- Two to ten years in prison
- Fines up to $25,000
- Mandatory felony conviction if found guilty
Although Illinois law technically permits probation in certain situations, Illinois courts treat felony weapon possession with extreme severity, and probation is rarely offered in Cook County.
Second Offense – Class 2 Felony
A second conviction can elevate the offense to a Class 2 felony.
Potential penalties include:
- Three to seven years in prison
- Enhanced sentencing exposure
- Fines up to $25,000
Certain enhanced Class 2 felony provisions, including unlawful possession of a firearm by a repeat felony offender, can increase the sentencing range to three to fourteen years in prison.
Armed Habitual Criminal Charges
Some defendants face even more serious allegations known as aggravated unlawful possession of a weapon and Armed Habitual Criminal charges.
Under 720 ILCS 5/24-1.7, a person possessing a firearm after two prior qualifying felony convictions may be charged as an Armed Habitual Criminal.
This offense is classified as a:
- Class X felony
- Six to thirty years in prison
- No probation available
Armed Habitual Criminal cases are among the most serious gun charges prosecuted in Illinois.
Possession of a firearm by someone with two prior qualifying felony convictions can dramatically increase the stakes in a criminal case.
Cook County Prosecutors Aggressively Pursue Gun Cases
Cook County prosecutors frequently seek detention and prison sentences in gun cases.
Recent trends include:
- Reduced willingness to offer probation
- More aggressive charging decisions
- Increased detention requests
- Fewer plea offers involving reduced charges
Because prosecutors rarely offer leniency on felon-in-possession charges, experienced legal representation is essential.
Common Situations Leading to Arrest
Unlawful possession of a weapon cases often arise from:
Traffic Stops
Police officers frequently claim to discover firearms during:
- Vehicle searches
- Consent searches
- Inventory searches
Passengers and drivers may both be charged.
Street Encounters
Many arrests result from:
- Investigatory stops
- Police suspect encounters
- Anonymous tips
- Foot pursuits
Search Warrants
Weapons are frequently recovered during:
- Search warrant executions
- Drug investigations
- Domestic investigations
- Other criminal investigations
Each type of police encounter raises potential constitutional issues.
Fourth Amendment Defenses
Many successful defenses arise from violations of Fourth Amendment rights, and a seasoned Chicago criminal defense lawyer will carefully analyze how the police handled your case.
An experienced criminal defense lawyer carefully examines:
- Probable cause
- Search warrants
- Traffic stop legality
- Consent issues
- Arrest procedures
A lawyer can file a motion to suppress evidence if police lacked probable cause or conducted an illegal search.
If the firearm is suppressed, the prosecution’s case often collapses.
Challenging Fourth Amendment violations frequently results in dismissals, reduced charges, or favorable plea negotiations.
Common Defense Strategies
Every case requires a defense strategy tailored to the facts.
Common defenses include:
Lack of Possession
The prosecution must prove possession beyond a reasonable doubt.
Lack of Knowledge
The prosecution must establish that the defendant knowingly possessed the firearm.
Mistaken Identity
Mistaken identity can create reasonable doubt, particularly in cases involving multiple occupants of a vehicle or residence.
Illegal Search and Seizure
Evidence obtained through unlawful police conduct may be suppressed.
Challenging Prior Conviction Evidence
The prosecution must properly prove the prior felony conviction.
Errors in criminal history records occasionally create viable defenses.
Early Legal Representation Matters
The earliest stages of a gun case are often the most important.
Early legal representation allows an attorney to:
- Preserve evidence
- Review police reports
- Interview witnesses
- Challenge detention
- Investigate search issues
- Develop defense strategies
Waiting can reduce available legal options.
Why Hire Andrew M. Weisberg?
As a former Cook County prosecutor, Andrew M. Weisberg understands how gun cases are charged and prosecuted.
Clients benefit from:
- Extensive knowledge of Illinois gun laws
- Experience handling serious felony charges
- Strategic defense planning
- Aggressive courtroom advocacy
- Personalized representation
Andrew personally handles every case and works directly with clients from beginning to end, a commitment reflected in numerous client reviews describing their experiences.
Contact an Unlawful Possession of a Weapon by a Felon Lawyer Chicago Today
If you have been charged with unlawful possession of a weapon by a felon, armed habitual criminal, unlawful use of a weapon, or another firearm offense, immediate legal representation is essential.
A felony conviction can affect your freedom, employment opportunities, housing options, firearm rights, and future.
Contact Andrew M. Weisberg for a free consultation by calling (773) 908-9811 anytime, day or night, or complete the Case Review Form on this website.
An experienced criminal defense attorney can help protect your constitutional rights, challenge the prosecution’s evidence, and pursue the strongest defense possible.




















