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Eric Michael Walter

Cannabis Law Attorney at Saint Louis, MO

5.0   7 reviews
  • State Years
    Illinois - IL 24 years
    Missouri - MO 25 years
    Texas - TX 15 years
  • Licensed for 24 years
    State IL
    Acquired 1999
    Active and Authorized to Practice Law No misconduct found
  • Licensed for 25 years
    State MO
    Acquired 1998
    Good Standing, Active No misconduct found
  • Licensed for 15 years
    State TX
    Acquired 2008
    Inactive No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Eric

Learn Eric’s areas of practice.

Practice areas
  1. Cannabis Law
    I advise clients on marijuana regulatory compliance, legislative initiatives, business disputes, mergers and acquisitions, investments, and other corporate and operational issues in state-authorized marijuana industries across the country.

  2. Litigation
    I have handled many different types of litigation, both as plaintiffs and defendants. Much my current practice involves defending consumer class actions lawsuits and litigating disputes concerning medical marijuana facility licenses.

    25 years, 150 cases

  3. Business
    I assist clients with a range of business matters and disputes.

    16 years, 100 cases

Eric's practice primarily involves representing businesses and individuals in the legalized marijuana industry. He has successfully represented companies across the country applying for facility licenses to cultivate, manufacture, and dispense marijuana and marijuana-infused products. Eric assists clients with every facet of procuring and compliantly operating marijuana facility licenses, along with mergers and acquisitions, other corporate matters, legislative and regulatory issues, and related matters. Eric also represents MoCannTrade, Missouri's marijuana industry trade association.

Eric has extensive state and federal litigation experience in a wide-range of complex commercial and business cases that include: a religious conference center prevailing in a long-running corporate governance and property dispute; a major men’s retail chain defeating false advertising claims by different state-wide classes of customers; and a publicly-traded company defeating breach of fiduciary duty claims by a national class of former stockholders.

Eric serves privately owned businesses, publicly traded companies and nonprofit corporations. A significant portion of this work involves the defending class action lawsuits brought against various business entities. Many of the cases involve allegations of fraud, false advertising, unfair trade practices and breaches of state and federal consumer protection laws.

Eric also represents clients in matters alleging breach of contract, breach of fiduciary duty, fraud, and copyright infringement. He also provides counsel in workplace cases involving claims such as discrimination and violation of non-compete and nonsolicitation provisions.


Armstrong Teasdale LLP
7700 Forsyth Boulevard
Suite 1800
Saint Louis, MO, 63105


5.0 / 5.0
  7 customer reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Posted by anonymous | January 23, 2018
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Great experience
Eric was very prompt in contacting, after I sent the request. He is very professional & knowledgeable and patiently heard my details. I will be contacting him again in about one week to discuss further and if needed (as I’m not the direct party), will hire him.
Posted by Micah | July 10, 2013
First time needing a lawyer so I was not sure what to do.Mr Walter was top notch . He explained everything in detailed as to how the system works. Never did I have to call and ask him what the next step was. He always called me to keep me informed , even if it was on weekends . He was always looking out for what was right, for me and my Family. And I believe at some points he took it personally. Eric Walter was our best choice in the end for me and my family , hands down!
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Posted by Jerry | June 20, 2012
TOP Tier Attorney-When you must have the very BEST
Mr. Walter can best be described as a top lawyer/ top litigator at one of St. Louis best firms. He is first class BUT also very approachable and is quick at answering and returning calls which is so critical in any litigation. Eric has a great support team that assist him and are also first rate. I think the founding partner said it best to me one day when I was down at the firm for a deposition..." with Eric you have the VERY best, not just in our firm, but the city and the country".
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Posted by Kathy | June 20, 2012
Eric M. Walter Review
Eric M. Walter is knowledgable, thorough, conscientious, kind and empathic. He has a unique ablility to teach the difficult subject to law to his clients while handling the business end with professionalism and precision.
Posted by Chris | June 19, 2012
Great Results!
Eric's services were impeccable! He always called to keep me updated and get my input. He returned my calls, even when I called at odd hours. He went out of his way to get the results I needed. I would hire him again in a heartbeat. He is a true professional, and gets the job done.
Posted by Steven | June 18, 2012
Exceptional Service
Mr. Walter has served The Baptist Home superbly. His proactive and timely approach to complicated issues has saved The Baptist Home countless amounts of money and time while serving our not-for-profit purposes globally. His wide range of practical expertise has benefited The Baptist Home's multiple legal issues regarding corporate law, employment law, long term care regulations, environmental law, donor gifting, estate planning, real estate, tax law, oil-gas leasing and many others. He is immediately responsive to every legal need.
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Posted by John | June 18, 2012
Review Eric Michael Walter - Guilfoil, Petzall & Shoemake, L.L.C.
Eric has been extremely helpful in my lawsuit. His personality, knowledge and follow-up keeping me informed has been fantastic. I highly recommend Eric.
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  • Free Consultation 30 minutes
  • Hourly Rates $ 550-675 per hour
Payment methods
Cash, Check, Credit Card


AVVO RATING 10.0 (Superb)

Work Experience

  • Partner
  • Armstrong Teasdale
  • 2014 - Present
  • Member
  • Guilfoil Petzall & Shoemake, LLC
  • 2000 - 2014
  • Assistant Attorney General
  • Missouri Attorney General's Office
  • 1998 - 2000


  • University of Missouri - Columbia School of Law
  • JD - Juris Doctor
  • 1998
  • University of Missouri, Columbia
  • BS - Bachelor of Science
  • 1995

Sample of Legal Cases

  • Camasta v. Jos. A. Bank Clothiers, Inc., 761 F.3d 732 (7th Cir. 2014)
  • The Seventh Circuit Court of Appeals unanimously affirmed the district court's dismissal of all the claims against our client.
  • Nickell v. Shanahan, et al., 439 S.W.3d 223 (Mo. 2014)
  • The Missouri Supreme Court affirmed the dismissal of the claims against our clients.
  • Waldron, et al. v. Jos. A. Bank Clothiers, Inc.
  • The Court dismissed all the claims against our client.
View all legal cases


  • Bar Association of Metropolitan
  • Committee member
  • 2001 - Present
  • Illinois State Bar Association
  • 1999 - Present
  • Missouri State Bar Association
  • 1998 - Present
  • Bar Association of Metropolitan St. Louis
  • Committee Chair
  • 2002 - 2021
View all associations

Languages Spoken

  • English

Honors and Awards

  • Class Action/Mass Torts: Defense
  • Super Lawyers
  • 2018
  • Business Litigation
  • Super Lawyers
  • 2017


  • Missouri Environmental Law & Policy Review
  • Balancing Local Concerns with CERCLA Policies: The Importance of Perspective in Considering the Application of Federal Mandates
  • 1998

Speaking Engagements

  • Continuing Legal Education
  • False and Deceptive Advertising Claims
  • 2015
  • Continuing Legal Education
  • Employment Law Issues and Best Practices
  • 2012
  • Continuing Legal Education
  • E-Discovery
  • 2008

Attorney endorsements

Received (8)
Given (6)
Endorse Eric
Personal injury Attorney | May 30
Relationship: Fellow lawyer in community
"I endorse Eric. He is a highly skilled attorney that is well respected in the legal community."
Litigation Attorney | Oct 24
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Litigation Attorney | Jul 09
Relationship: Co-worker
"I endorse this lawyer."
Litigation Attorney | Jul 08
Relationship: Worked for lawyer
"I endorse this lawyer."
Lawsuits and disputes Attorney | Jun 19
Relationship: Co-worker
"Eric is a top notch litigator. He knows when to be tough and when to seek settlement and quicly latches onto the key legal issues to be addressed. I have worked with Eric for more than five (5) years and do not hesistate to refer his name."
Litigation Attorney | Jun 19
Relationship: Worked together on matter
"Eric is a good friend and colleague that I hold in the highest of regards. I worked with Eric at the Missouri Attorney General's Office, and was immediately impressed with his litigation skills and attention to detail. We both entered private practice at about the same time, and I have had the pleasure to work with him as co-counsel on a couple of occasions. Eric has handled very complex matters, which required extensive analysis and planning in order to protect his client's diverse interests. Eric's work is always thorough and timely, which often works to place his clients in advantageous positions in their legal matters. Knowing Eric's work ethic, I have regularly referred matters to him. Eric is constantly volunteering his time to better our legal community, including serving as the chairperson for the annual golf outing for the Bar Association of Metropolitan St. Louis. This is an important position as it is one of the Association's largest social events of the year."
Business Attorney | Jun 15
Relationship: Fellow lawyer in community
"I endorse this lawyer. Eric is an excellent attorney and top-notch."
Litigation Attorney | May 28
Relationship: Fellow lawyer in community
"Eric is an excellent attorney who is fully dedicated to his clients and his practice. I strongly endorse and recommend Eric to anyone needing representation in any of Eric's practice areas."
View more endorsements

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