Skip to Content Top
Drug Crimes

Drug Crime Attorney in St. Louis County

Work Directly With a Former St. Louis County Prosecutor

A St. Louis County drug charge requires an individualized review of the alleged substance, quantity, conduct, criminal history, and evidence obtained by police. We handle matters involving drug possession, possession with intent to sell, trafficking, and alleged manufacturing of controlled substances.

These allegations can affect employment, housing, education, professional licensing, immigration status, or family matters, depending on your circumstances. The immediate legal questions include how the prosecution classified the offense, whether prior convictions affect the potential sentence, and whether officers lawfully obtained the evidence.

Attorney Jack Cavanagh is a former Assistant Prosecuting Attorney for St. Louis County with more than 50 years of legal experience. Clients work directly with Attorney Cavanagh as he reviews the arrest, evidence, prior record, and available paths through the criminal process.

Call (314) 309-2799 to discuss your drug charge directly with Attorney Jack Cavanagh.

Missouri Drug Charge Classifications

Not every Missouri controlled-substance possession charge is a Class D felony. Classification depends on the substance, amount, alleged conduct, and applicable statutory provisions. Missouri law also establishes separate thresholds for possession of marijuana and synthetic cannabinoids.

Possession generally requires proof that a person knowingly had the substance on their person or under their control. Constructive possession refers to an allegation that someone knowingly controlled a substance even though it wasn’t found directly on that person. Cases involving a shared vehicle, home, or container can raise important questions about knowledge and control.

Missouri drug allegations can involve several distinct offenses:

  • Drug possession: Knowingly possessing a controlled substance, with classification affected by the substance and quantity.
  • Possession with intent to distribute: Knowingly possessing a controlled substance with the alleged intent to distribute or deliver it.
  • Drug trafficking: Alleged conduct evaluated under trafficking statutes with elements and penalty ranges that differ from simple possession.
  • Drug manufacturing: Alleged production or preparation of a controlled substance, which requires separate analysis of the statutory elements and supporting evidence.

The title assigned to an offense doesn’t determine whether the evidence proves every required element. We review the charging document, police reports, laboratory evidence, witness accounts, and the circumstances used to support an accusation of possession, intent, trafficking, or manufacturing.

Prior & Persistent Drug Offender Allegations

Missouri law defines a prior drug offender as someone with one qualifying controlled-substance felony finding. A persistent drug offender generally has two or more qualifying findings. For certain offenses, these designations can increase the authorized class of imprisonment.

A prior conviction shouldn’t be assumed to qualify automatically. The analysis can depend on the offense, jurisdiction, court records, date, and statutory requirements. We examine the records supporting the allegation and how the claimed status could affect the current case.

Search & Seizure Issues in Drug Cases

Drug evidence is often discovered during a traffic stop, vehicle search, search of a residence, or arrest. We review police reports, gather available evidence, and examine whether officers had a lawful basis for the stop, detention, search, seizure, questioning, and arrest.

The review may also address statements made to law enforcement, who had access to the location where a substance was found, and how evidence was collected and handled. When the circumstances support it, pretrial motions can challenge improperly obtained evidence or other evidentiary issues. The effect of any motion depends on the facts and the court’s rulings.

Possible Paths Through a St. Louis County Drug Case

A case may involve investigation, pretrial motions, negotiations, trial preparation, trial, or sentencing advocacy. The appropriate path depends on the charge, admissible evidence, criminal history, available legal options, and your goals. We provide direct guidance as those issues develop rather than routing the case solely through a paralegal.

St. Louis County Circuit Court also operates an Adult Drug Court within its Treatment Court system. Screening isn’t automatic. Eligibility can depend on the charged offense, criminal history, prosecutorial review, court approval, program requirements, and the person’s ability to comply with the conditions.

Discuss Your Drug Charge Directly With an Attorney

During a consultation, you can discuss the charge, circumstances of the arrest, prior convictions, upcoming court dates, and immediate questions about what happens next. You will work directly with Attorney Jack Cavanagh as he evaluates the legal and factual issues in your case. We serve clients facing drug charges in St. Louis County as well as St. Louis, St. Charles, Chesterfield, and the surrounding areas.

Arrange a consultation or Contact our Missouri law firm today. Call (314) 309-2799 to discuss your case, and save (314) 309-2799 for direct access when questions arise.

Continue Reading Read Less

Our Clients Mean Everything to Us

Read Stories Directly From People We've Helped
    "Would recommend"
    Jack resolved a case from 1500 miles away in a timely manner. Professional throughout the entire process, took the time to understand my needs as a client and fulfilled them without ever wavering in his commitment or price. Would recommend.
    - Patrick S.
    "Two things define you. Your patience when you have nothing, and your attitude when you have everything."
    My experience with Mr. Cavanagh was very pleasant. I was kept informed about what was going on with my case. Phone calls were returned promptly and everything was explained to me. Knowledgeable, personable and fair - can't ask for much more than that. He was on my side. One more thing.... he's not a pushover when it comes to the opponent! Love it!
    - Terri Buckner
    "Jack did a great job representing me"

    Jack did a great job representing me while dealing with a high conflict ex. He was able to tell me what to expect and what was worth fighting for and did it in a way that made it easy to accept.

    - Dustin G.
    "The best there is in the Biz"
    Jack has been a lawyer for a long time. He values his clients and sees them as people with individual circumstances, and not just dollar bills like other attorneys. Anyone that knows anything about the law knows it’s about making and keeping good rapport with all parties involved. And for a defense attorney, being familiar with the judge to the prosecutor and being on a friendly basis with them is exceptionally important. And Jack knows everyone! He should as he’s been doing this for probably over 40 years. He’s not only a great attorney but I consider him a friend. Don’t make the mistake of choosing an unknown rookie attorney who may be a couple bucks cheaper. Choose Jack!
    - Paige
    "Experience is priceless"
    Jack and Eka were very professional in handling my case. I would definitely recommend them to others and use them again. Jack has 50 years experience!
    - Michele
    "Truth will always prevail."
    First of all, it was hard to find a lawyer that works with grandparents rights. Jack did a great job and we get to see our grand-daughter for the first time in a year. We are very thankful to him.
    - Mr. Callaway
    "I would give her 10 Stars if I could!"
    They are very very professional and very quick to respond so you're not left in the dark about anything to do with your case! I was very happy with the results of my case and my experience with them. I highly recommend if you're looking for a divorce lawyer or any kind of family law, Jack cavanaugh and his associates are great! I have to give a special shout out to Eka because she really made my life a heck of a lot easier and was always so quick to get back to me and let me know what is going on! I would give her 10 Stars if I could!
    - Courtney T.
    "He has worked with me even though we are in different states to ensure I am kept abreast of what is going on."
    He has worked with me even though we are in different states to ensure I am kept abreast of what is going on.
    - Former Client