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Kansas City Criminal Defense

Unlawful Possession of a Firearm Defense Attorney

Felon in possession is one of the most commonly charged weapons offenses in the Kansas City metro. Missouri law doesn't require you to fire, display, or even touch the gun — constructive possession alone is enough for a felony charge carrying up to 7 years in prison.

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What Is Unlawful Possession of a Firearm?

Under RSMo §571.070, it is a felony for certain categories of people to possess a firearm in Missouri. Unlike unlawful use of a weapon — which focuses on how a weapon is used — unlawful possession is a status-based offense. It doesn't matter how the gun was used, displayed, or carried. If you fall into a prohibited category and a firearm is found in your possession or control, you can be charged.

This is one of the most frequently charged weapons offenses in the Kansas City metro. It often arises during traffic stops, drug investigations, domestic disturbance calls, and probation or parole checks — situations where police discover a firearm and then determine the person has a prior felony conviction.

Who Is Prohibited from Possessing a Firearm?

Missouri law prohibits firearm possession by the following categories of people:

Prohibited Persons Under RSMo §571.070

  • Convicted felons — Anyone previously convicted of a felony under Missouri law, federal law, or the law of any other state. This is the most common basis for unlawful possession charges.
  • Fugitives from justice — Anyone who has fled from any state to avoid prosecution or to avoid giving testimony in a criminal proceeding.
  • Persons adjudicated mentally incompetent — Anyone who has been adjudicated as mentally incompetent or committed to a mental health facility.
  • Habitual drug users or intoxicated persons — Anyone who is habitually in an intoxicated or drugged condition.

Actual Possession vs. Constructive Possession

Missouri law recognizes two forms of possession — and the distinction is critical to many unlawful possession cases:

Types of Possession

  • Actual possession — The firearm is physically on your person — in your waistband, your pocket, your hand. This is straightforward and typically harder to challenge.
  • Constructive possession — The firearm is not on your person but is in an area over which you exercise control — your car, your home, your backpack, a shared bedroom. The State must prove you knew the gun was there and had the ability and intent to exercise control over it.

Constructive possession is where most unlawful possession cases are won or lost. If a gun is found in a car with multiple passengers, in a shared apartment, or in a common area — the question of who actually "possessed" it becomes the central issue. The State must prove more than proximity. They must prove awareness, access, and control — and all three can be challenged.

Penalties

Sentencing Ranges

  • Class D Felony (standard): 1 to 7 years in prison and up to $10,000 fine. This is the baseline charge for most first-time unlawful possession cases.
  • Class C Felony (enhanced): 3 to 10 years in prison. Applies when the defendant has a prior conviction for a dangerous felony or certain drug offenses.
  • Additional consequences: A conviction permanently bars you from possessing firearms under both Missouri and federal law. It also creates employment barriers, housing difficulties, and professional licensing problems.

Common Scenarios That Lead to Unlawful Possession Charges

How These Cases Typically Start

  • Traffic stops: Police discover a firearm during a traffic stop — in the glove box, under the seat, or in the trunk. If the driver or a passenger has a prior felony, unlawful possession charges follow immediately.
  • Drug investigations: A firearm found during a drug search often results in both drug charges and unlawful possession charges — and potentially Armed Criminal Action if the gun is connected to the drug offense.
  • Domestic disturbance calls: Police respond to a domestic call, see a firearm in the home, and discover that one of the occupants is a convicted felon.
  • Probation or parole checks: A routine home visit or compliance check uncovers a firearm, triggering both new criminal charges and a probation or parole violation.
  • Someone else's gun: The firearm belongs to a roommate, partner, or family member — but because it's in a shared space, prosecutors charge the convicted felon with constructive possession.

Unlawful Possession vs. Other Weapons Charges

Key Distinctions

  • Unlawful Possession (RSMo §571.070): Status-based. Targets who has the weapon. The conduct doesn't matter — simply having the gun is the offense.
  • Unlawful Use of a Weapon (RSMo §571.030): Conduct-based. Targets how the weapon is used, carried, or displayed. A legal gun owner can be charged based on their behavior.
  • Armed Criminal Action (RSMo §571.015): Enhancement charge. Filed when a weapon is used during a separate felony. Requires an underlying felony offense.

A single incident can result in charges under all three statutes — unlawful possession for having the gun, UUW for how it was used, and ACA if a separate felony was committed. Each charge carries independent penalties.

Common Defense Strategies for Unlawful Possession

Unlawful possession cases are built almost entirely on two questions: were you a prohibited person, and did you actually possess the firearm? Both can be challenged:

Challenging Constructive Possession

This is the most common and most effective defense. If the gun was found in a shared space — a car with passengers, a home with roommates, a bedroom used by multiple people — the State must prove you specifically knew the gun was there and had control over it. Proximity alone is not possession. We challenge the State's theory of who actually possessed the firearm.

Suppression of Evidence — Illegal Search

The Fourth Amendment protects you from unreasonable searches and seizures. If police searched your car without probable cause, entered your home without a warrant, or conducted a pat-down without reasonable suspicion, the firearm itself may be suppressible. Without the gun in evidence, the case collapses. We scrutinize every detail of the search.

Challenging the Traffic Stop

Many unlawful possession cases begin with a traffic stop. If the officer lacked reasonable suspicion to pull you over, or if the stop was pretextual (using a minor traffic violation as an excuse to search for weapons), everything that flows from the stop — including the gun — can be challenged.

Lack of Knowledge

You cannot be convicted of possessing something you didn't know was there. If someone else placed the gun in your car, your bag, or your home without your knowledge, you didn't knowingly possess it. We investigate how the gun ended up where it was found and whether you had any reason to know it was there.

The Gun Belongs to Someone Else

Ownership matters — especially in shared-space cases. If the firearm is registered to your roommate, your partner, or someone else in the vehicle, that fact can raise reasonable doubt about whether you were the one who possessed it. We identify the actual owner and challenge the State's theory that you exercised control.

Gun Rights Restoration

In some cases, a defendant's gun rights may have been restored under Missouri law — either through an expungement of the underlying felony or through a specific restoration petition. If your rights were restored before the possession occurred, the charge may not stand. We investigate your legal history to determine whether this defense applies.

How Unlawful Possession Cases Are Handled in Kansas City

Felon-in-possession cases are among the most heavily prosecuted weapons charges in the Kansas City metro. Jackson County prosecutors file these charges aggressively — often stacking unlawful possession with drug charges, Armed Criminal Action, or probation violations to create maximum sentencing exposure. KCPD and the ATF also collaborate on federal firearms initiatives, meaning some KC-area possession cases get picked up by federal prosecutors in the Western District of Missouri, where mandatory minimums are even harsher.

The way these cases are discovered matters for the defense. Traffic stops, consent searches, and domestic calls are the most common triggers — and each one creates potential Fourth Amendment challenges. A gun found during an illegal traffic stop, a search that exceeded the scope of consent, or an entry into a home without a warrant can all lead to the firearm being suppressed as evidence.

The Hartley Law Firm handles unlawful possession cases across Jackson, Clay, Platte, and Cass Counties. We know how prosecutors build these cases, which judges handle weapons dockets, and where the constitutional weaknesses lie. That knowledge shapes every defense strategy we build.

Courts Where We Defend Unlawful Possession Cases

The Hartley Law Firm handles felon-in-possession and unlawful possession cases across the Kansas City metro.

Jackson County

The highest volume of unlawful possession cases in the metro. Felon-in-possession is one of the most commonly filed weapons charges at the Jackson County Courthouse.

Clay County

Cases heard at the Clay County Courthouse in Liberty. Unlawful possession charges frequently arise from traffic stops and domestic calls in the Northland.

Platte County

Cases handled at the Platte County Courthouse in Platte City. Possession cases along the I-29 corridor and in Parkville and Riverside.

Cass County

Cases heard at the Cass County Courthouse in Harrisonville. Unlawful possession charges from Belton, Raymore, and the southern metro area.

Frequently Asked Questions About Unlawful Possession

Can I be charged if the gun wasn't on me?
Yes. Missouri law recognizes constructive possession — meaning you can be charged if the gun was in an area you controlled, like your car, home, or backpack, even if it wasn't physically on your person. However, the State must prove you knew it was there and had the ability and intent to control it. Proximity alone is not enough.
What if the gun belongs to my roommate or partner?
Ownership is a factor but not a complete defense by itself. If the gun is in a shared space — a living room, a shared vehicle, a bedroom used by both people — prosecutors will argue constructive possession. The defense focuses on establishing that you didn't know the gun was there, that someone else had exclusive control over it, or that the State can't prove you exercised dominion over it.
Can I ever own a gun again after a felony conviction?
Possibly. Missouri law does provide pathways to restoring gun rights in certain circumstances — including expungement of the underlying felony or a specific petition for restoration. Whether you qualify depends on the type of felony, how much time has passed, and your subsequent criminal history. We can review your record and advise whether gun rights restoration is a realistic option.
What happens if I'm on probation and caught with a gun?
You face two separate proceedings: new criminal charges for unlawful possession, and a probation violation that could revoke your existing probation and send you to prison on the original case. We defend both proceedings simultaneously and work to minimize the combined impact.
What's the difference between state and federal felon-in-possession charges?
Missouri charges unlawful possession under RSMo §571.070. Federal charges are brought under 18 U.S.C. §922(g) and are prosecuted in the Western District of Missouri. Federal cases carry mandatory minimum sentences, are subject to federal sentencing guidelines, and generally result in longer prison terms. Some KC-area cases get referred to federal prosecutors through joint ATF/KCPD task forces — making it critical to have an attorney who understands both systems.
Can the search that found the gun be challenged?
Absolutely — and this is one of the most effective defenses. If the gun was found during an illegal traffic stop, a warrantless search of your home, a search that exceeded the scope of your consent, or a pat-down without reasonable suspicion, the firearm may be suppressed as evidence. Without the gun, the State has no case. We challenge every search.
What if I didn't know the gun was there?
Lack of knowledge is a valid defense. If someone placed a gun in your car, your home, or your belongings without your awareness, you didn't knowingly possess it. The State must prove you knew the firearm was present — and in shared-space situations, that proof is often circumstantial and challengeable.
How quickly should I hire an attorney after being charged?
Immediately. Unlawful possession cases often hinge on the legality of the search that discovered the weapon. Your attorney needs to review the circumstances of the stop, the search, and the seizure as early as possible — before evidence is lost and before the prosecutor's version of events becomes the only version. Call The Hartley Law Firm at 816-451-0909 for a free consultation.

Charged with Unlawful Possession of a Firearm?

These cases are often won by challenging the search. Call The Hartley Law Firm today for a free consultation.

Book Your Free Consultation Or call now — 816-451-0909