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First-Degree Involuntary Manslaughter Lawyer in St. Louis

Build a Powerful Defense Against First-Degree Manslaughter Charges

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Last Updated: March 19, 2026

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First-Degree Involuntary Manslaughter Lawyer

St. Louis, MO

Charged with first-degree involuntary manslaughter in St. Louis, MO? Following an offense involving alleged recklessness, you need aggressive legal representation. At Combs Waterkotte, we bring over 60 years of experience and have handled more than 10,000 cases—saving clients from over one million days in jail. Contact our experienced St. Louis criminal defense lawyers today at (314) 900-HELP or contact us online for a free consultation.

Cases Handled

Over 10,000

Jail Days Saved

Over 1 Million

Google Reviews

400+ Perfect

Legal Experience

Over 60 Years

What is a First-Degree Involuntary Manslaughter Charge in Missouri?

What is a First-Degree Involuntary Manslaughter Charge in Missouri?

First-degree involuntary manslaughter is defined as recklessly causing another person’s death. It is typically a Class C felony, but can be elevated depending on circumstances.

It may be charged as a more serious offense if:

  • You have a prior DWI conviction
  • Multiple people were killed
  • The victim was not a passenger
  • Your BAC was 0.18% or higher
  • The victim was a law enforcement officer

Recklessness involves consciously disregarding a substantial and unjustifiable risk to others.

When you are facing life-changing penalties, following a first-degree involuntary manslaughter charge, Combs Waterkotte is prepared to defend your rights and protect your future. Speak to our St. Louis first-degree involuntary manslaughter lawyer today at (314) 900-HELP.

Penalties for First-Degree Involuntary Manslaughter in St. Louis

Penalties for First-Degree Involuntary Manslaughter in St. Louis

Penalties vary depending on the classification:

  • Class C felony: 3–10 years in prison and fines up to $10,000
  • Class B felony: 5–15 years in prison
  • Possible driver’s license suspension in vehicular cases
  • Mandatory minimum sentences in intoxication-related cases

What Happens After an Arrest in St. Louis?

What Happens After an Arrest in St. Louis?

After an arrest, you can expect the following:


What to Do After Being Charged

What to Do After Being Charged

If you are charged, take these steps immediately:

  • Do not speak to law enforcement without an attorney
  • Do not post about your case on social media
  • Do not consent to searches
  • Do not contact the victim’s family
  • Request legal counsel immediately

How Prosecutors Prove the Charge

How Prosecutors Prove the Charge

The prosecution must prove beyond a reasonable doubt that you recklessly caused another person’s death. This includes:

  • Establishing reckless behavior
  • Proving direct causation
  • Presenting evidence such as witnesses or expert testimony

Prior conduct such as DWI or reckless driving may be used to show a pattern.


Available Defenses

Available Defenses

Depending on your case, defenses may include:

  • Lack of recklessness
  • No direct causation
  • Another party was responsible
  • Mechanical failure
  • Insufficient evidence
  • Self-defense
  • Constitutional violations (illegal search or Miranda violations)
  • Alibi or mistaken identity

Getting Charges Reduced or Dismissed

Getting Charges Reduced or Dismissed

We will challenge the key elements that the prosecution has to prove and fight to get your charges reduced or dismissed. Even if a dismissal is unlikely in your case, we may be able to get your charges reduced to a lesser offense such as:

Undermining recklessness or causation are two particularly effective strategies. When these elements cannot be proven beyond a reasonable doubt, it becomes much more difficult to sustain a conviction.



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What You're Facing in a St. Louis First-Degree Involuntary Manslaughter Case vs. How We Can Help You?

What You’re Facing in a St. Louis First-Degree Involuntary Manslaughter Case vs. How We Can Help You

A first-degree involuntary manslaughter conviction has the potential to change the rest of your life. It is imperative that you understand what you’re facing and how our St. Louis criminal defense lawyers can help you.

What You’re Facing

  • Prison sentence and fines
  • Potential driver’s license suspension
  • Felony record that follows you for life
  • An aggressive prosecution pursuing your case

How We Can Help

  • Fight for a dismissal or reduction of charges
  • Examine the evidence and file motions to suppress
  • Show errors in the prosecution’s case and build the strongest defense
  • Ensure your rights are protected and give you peace of mind each step of the way

  • Murder 1st and ACA

    Charge

    Murder 1st

    Result

    Not Guilty Verdict

    Combs Waterkotte represented a Northeast Missouri man on charges of 1st degree murder and armed criminal action in Adair County, Missouri. The prosecution all …

    Charge

    Murder 1st

    Result

    Not Guilty Verdict

  • Murder 2nd, ACA, and Abandonment of a Corpse

    Charge

    Murder 2nd

    Result

    Dismissed

    Combs Waterkotte represented an individual charged with murder in the 2nd degree, armed criminal action and abandonment of a corpse. After a thorough pretrial …

    Charge

    Murder 2nd

    Result

    Dismissed

  • Voluntary Manslaughter and ACA

    Charge

    Voluntary Manslaughter and ACA

    Result

    Probation

    Combs Waterkotte represented an Overland, MO man charged with voluntary manslaughter and armed criminal action after an argument at a backyard BBQ result in o …

    Charge

    Voluntary Manslaughter and ACA

    Result

    Probation

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    Facing First-Degree Involuntary Manslaughter Charges?

    Facing First-Degree Involuntary Manslaughter Charges in St. Louis? We Can Protect Your Future

    When you are facing a charge as serious as first-degree involuntary manslaughter, you need a defense team that knows how to act fast and decisively. Our St. Louis involuntary manslaughter lawyers know how to challenge charges from the very beginning, file strategic motions, negotiate effectively with prosecutors and uncover weaknesses in the prosecution’s case to defend your rights.

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    A Defense Strategy Built to Challenge the Prosecution at Every Step

    At Combs Waterkotte, we are committed to tirelessly protecting you and guiding you toward the best possible outcome in your case. We understand both defense and prosecution strategies, giving us a unique advantage when building your defense.

    With a network of investigators and forensic experts ready to get to work, we leave no detail overlooked when preparing your case.

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    Relentless Advocacy Backed by Experience and Results

    We are available 24/7 and are committed to providing compassionate care and personal attention every step of the way. Having handled more than 10,000 cases, we have successfully secured felony charge dismissals and reductions for our clients.

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    Call our St. Louis First-Degree Involuntary Manslaughter Lawyers

    Call (314) 900-HELP and Speak with Our St. Louis First-Degree Involuntary Manslaughter Lawyers Today

    When you are facing a first-degree involuntary manslaughter charge, you can count on Combs Waterkotte to go to bat for you. Retaining an experienced St. Louis criminal defense attorney ensures you have the guidance and support you need throughout your case.

    Protect your future now. Contact us at (314) 900-HELP or contact us online for a free consultation.

    Our Record

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    Impeccable Record
    of Success

    Impeccable Record of Success

    • Over 10,000 Cases Handled
    • Over 400 Five-Star Reviews
    • Multiple Major Media Appearances
    • Over Six Decades of Experience
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    St. Louis

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