Missouri Firearm Possession Defense Attorney

Quick Reference: Unlawful Possession Under §571.070

What the Law Actually Says

Section 571.070 creates a straightforward prohibition: certain categories of people may not possess firearms, and possession by a prohibited person is a felony. The statute works in conjunction with federal law (18 U.S.C. §922(g)) to create a layered prohibition system where both state and federal charges can apply to the same conduct.

Prohibited Persons Under Missouri Law (§571.070)

Missouri law prohibits firearm possession by:

Convicted felons — Any person convicted of a felony under Missouri law, federal law, or the law of any other state or jurisdiction. The prohibition applies regardless of whether the felony involved violence, drugs, property crimes, or any other offense category. A conviction for felony stealing 20 years ago triggers the same prohibition as a recent conviction for assault.

Adjudicated mentally incompetent — Any person who has been found by a court to be mentally incompetent or committed to a mental health facility. This includes involuntary commitments and court-ordered competency evaluations resulting in a finding of incompetency.

Fugitives from justice — Any person who is a fugitive from justice — meaning there is an outstanding warrant for their arrest in any jurisdiction.

Additional Federal Prohibitions (18 U.S.C. §922(g))

Federal law extends the prohibition beyond Missouri’s categories to include:

Domestic violence misdemeanor conviction — Any person convicted of a misdemeanor crime of domestic violence in any jurisdiction. This is the federal provision that makes even a Class A Misdemeanor domestic assault conviction a permanent bar to firearm possession.

Persons subject to domestic protection orders — While the protection order is in effect, firearm possession is prohibited under federal law.

Unlawful users of controlled substances — Any person who is a current user of illegal drugs. This includes marijuana users even in states where marijuana is legal — because marijuana remains a Schedule I substance under federal law.

Persons under indictment for a felony — Federal law prohibits firearm purchases (though not necessarily possession) while under indictment.

Dishonorable discharge from the military — Permanently bars firearm possession under federal law.

Illegal aliens — Federal law prohibits firearm possession by persons unlawfully present in the United States.

The breadth of the federal prohibition means that a person can be legally eligible to possess firearms under Missouri state law but still be prohibited under federal law — creating a trap for individuals who do not understand the layered nature of firearms prohibitions.

The Classification Escalation

What makes §571.070 particularly dangerous is the criminal-history-based classification system:

Base offense (prior nonviolent felony): Class D Felony — up to 7 years. This applies when the prior conviction was a nonviolent felony — drug possession, felony stealing, property damage, or similar offenses.

Prior dangerous or violent felony: Class C Felony — up to 10 years. When the prior conviction was for a dangerous felony listed under §556.061(19) or a violent felony, the classification increases by one level.

Two or more prior violent felonies: Class B Felony — 5 to 15 years. Multiple violent priors push the classification to Class B, dramatically increasing sentencing exposure.

Possession during commission of a felony: +1 class enhancement. If the firearm is possessed during the commission of any other felony — a drug transaction, a burglary, an assault — the classification increases by one additional level above whatever the criminal history dictates.

This means a defendant with two prior violent felonies who possesses a firearm during a drug transaction could face Class A Felony exposure — 10 to 30 years or life — on the unlawful possession charge alone, before any other charges are considered.

Elements the Prosecution Must Prove

1. The defendant possessed a firearm. Actual possession (the firearm was on the defendant’s person or in their immediate physical control) or constructive possession (the firearm was in a location the defendant controlled, and the defendant had knowledge of its presence and intent to exercise dominion over it).

Constructive possession is the contested element in many cases. When a firearm is found in a shared vehicle, a common area of a residence, or a location accessible to multiple people, the State must prove more than proximity. Missouri courts require evidence that the specific defendant — not just someone in the vicinity — knew the firearm was there and had the ability and intent to control it.

1. The defendant was a prohibited person. The State proves this through certified court records — the judgment and sentence from the prior felony conviction, the court order of mental health adjudication, or other documentation of the disqualifying condition. The records must be authenticated and must show that the conviction or adjudication was final at the time of the alleged possession.
2. The defendant knew of the firearm’s presence and their prohibited status. The defendant must have been aware that the firearm was present and must have known (or reasonably should have known) that they were prohibited from possessing it. A person who was unaware that their prior conviction disqualified them from firearm possession may have a knowledge defense — though this is a narrow argument that depends on the specific circumstances.

Classification and Penalties

The dual prosecution risk is significant. A defendant can be charged under both §571.070 (state) and 18 U.S.C. §922(g) (federal) for the same act of possession — and dual sovereignty doctrine permits parallel prosecution without double jeopardy protection. A defendant acquitted at the state level can still be prosecuted federally, and vice versa.

Federal prosecution under the Armed Career Criminal Act is the most severe risk. ACCA’s 15-year mandatory minimum — which applies when the defendant has three or more prior convictions for violent felonies or serious drug offenses — transforms what might be a manageable state-level case into a sentence of 15 years minimum in federal prison, with no federal parole.

Defense Strategies That Work in Unlawful Possession Cases

Constructive Possession Challenges

The most effective defense in many unlawful possession cases. When a firearm is found in a shared location — a vehicle with multiple occupants, a residence with several inhabitants, a storage unit accessible to more than one person — the State must prove that the specific defendant knew about and controlled the weapon. The defense examines:

Whose belongings the firearm was found in or near. Whether the defendant had exclusive access to the location where the firearm was discovered. Whether the defendant’s fingerprints or DNA are on the firearm or its packaging. Whether other individuals had equal or greater access to the location. Whether the defendant’s conduct at the time of discovery (flight, statements, behavior) suggests awareness of the firearm — or lack thereof.

In multi-occupant vehicles, constructive possession is particularly contestable. A firearm found under the passenger seat of a car with four occupants does not automatically belong to the driver or any specific passenger — and the State must prove individual knowledge and control beyond a reasonable doubt.

Challenging the Prior Conviction

If the underlying felony conviction that creates the prohibition was constitutionally defective — the defendant was not represented by counsel, the guilty plea was not knowing and voluntary, the defendant was not advised of the rights being waived — it may not serve as a valid predicate for the §571.070 charge. Defense attorneys review the underlying conviction’s record for procedural deficiencies.

If the prior conviction has been expunged under §610.140, RSMo, Missouri state firearm rights are generally restored. However, this creates a complex situation: state expungement may restore state rights while federal rights remain prohibited. A person with an expunged felony may legally possess firearms under Missouri law but still violate 18 U.S.C. §922(g) — and federal courts do not consistently recognize state expungements as restoring federal firearms rights.

Second Amendment / Bruen Challenges

The U.S. Supreme Court’s 2022 decision in New York State Rifle & Pistol Association v. Bruen, 597 U.S. 1 (2022), established that firearms restrictions must be “consistent with this Nation’s historical tradition of firearm regulation.” Federal circuit courts are actively litigating whether blanket felon-in-possession prohibitions survive this historical-tradition analysis — particularly as applied to defendants whose prior convictions involved nonviolent conduct.

The Eighth Circuit (which covers Missouri) has not yet fully resolved this question, and defense attorneys are mounting as-applied challenges arguing that prohibiting firearm possession by nonviolent felons — a person convicted of felony marijuana possession 15 years ago, for example — is not consistent with the historical tradition the Supreme Court identified. This area of law is evolving rapidly, and Bruen-based challenges represent a genuine defense avenue that did not exist before 2022.

Suppression of the Firearm

If law enforcement discovered the firearm through an unlawful search — a traffic stop without reasonable suspicion, a frisk without articulable safety concerns, a vehicle search without probable cause or valid consent, a home search without a warrant or recognized exception — the weapon is suppressed regardless of the defendant’s prohibited status. The Fourth Amendment protects everyone, including prohibited persons, and constitutional violations during the search invalidate the evidence.

Unlawful possession cases frequently arise from traffic stops where officers conduct frisks or vehicle searches of questionable legality, probation or parole home visits that exceed the scope of supervision conditions, and drug investigations where firearms are discovered as secondary evidence. Each investigative method presents specific Fourth Amendment challenges.

Challenging ACCA Classification at the Federal Level

When federal prosecution triggers ACCA’s 15-year mandatory minimum, defense attorneys scrutinize each prior conviction that the government claims qualifies under the Act. ACCA requires three prior convictions for “violent felonies” or “serious drug offenses” — and the definition of “violent felony” has been extensively litigated. Prior convictions that do not meet the federal definition of violent felony — even if they were classified as violent under state law — may not qualify as ACCA predicates. Removing even one qualifying conviction drops the defendant below the three-conviction threshold and eliminates the mandatory minimum entirely.

Mere Presence Defense

Being in the same room, the same vehicle, or the same residence as a firearm does not constitute possession. The State must prove more than proximity — it must prove knowledge and control. A person who visits a friend’s home where a firearm is stored in a closet does not “possess” that firearm merely by being in the home. A passenger in a vehicle where a firearm is concealed under another person’s seat does not possess the firearm merely by riding in the car.

Collateral Consequences of Unlawful Possession Convictions

Federal firearms prohibition becomes permanent. An unlawful possession conviction adds another felony to the defendant’s record — reinforcing the prohibition and making future restoration of rights more difficult.

ACCA exposure increases. Each additional violent felony conviction moves a defendant closer to the three-conviction ACCA threshold — meaning a future federal charge could trigger the 15-year mandatory minimum.

Employment barriers compound. A weapons conviction on top of a prior felony creates additional employment barriers in security, law enforcement, military, and other fields.

Probation and parole consequences. For defendants on probation or parole at the time of arrest, an unlawful possession charge typically results in revocation of the existing supervision — meaning the defendant serves the remainder of the prior sentence in addition to any new sentence.

Rose Legal Services Defends Unlawful Possession Cases in St. Louis

Unlawful possession charges carry serious prison time at the state level and the constant risk of federal prosecution with mandatory minimums. Our firm handles these cases throughout St. Louis County, St. Charles County, Jefferson County, and Missouri courts — as well as the U.S. District Court for the Eastern District of Missouri. We challenge the search, the prior conviction, the constructive possession theory, and the State’s proof at every stage.

Call Rose Legal Services 24/7 for a free consultation. The defense starts with a conversation.

References

1. §571.070, RSMo [Unlawful possession of firearm — prohibited persons, classification escalation].
2. 18 U.S.C. §922(g) [Federal firearms prohibition — nine categories of prohibited persons].
3. 18 U.S.C. §924(e) [Armed Career Criminal Act — 15-year mandatory minimum].
4. §556.061(19), RSMo [Dangerous felony list].
5. §610.140, RSMo [Expungement — effect on firearm rights].
6. New York State Rifle & Pistol Association v. Bruen, 597 U.S. 1 (2022) [Historical-tradition framework].
7. U.S. Const. amend. IV; Mo. Const. art. I, §15 [Search and seizure protections].