Matthew Paul Diehr: Lawyer with Husch Blackwell LLP

Matthew Paul Diehr

St. Louis,  MO  U.S.A.

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Experience & Credentials

Practice Areas

  • Technology
  • Manufacturing & Transportation
  • Appellate
  • Business Litigation
  • Manufacturing
  • Government Compliance
  • Investigations & Litigation
  • Qui Tam / False Claims Act
Contact InfoTelephone: 314.480.1916
Fax: 314.480.1505
University Tulane University,, B.A., Political Economy/Political Science, cum laude; Dean's Honor Scholarship
Law SchoolSaint Louis University School of Law,, J.D., cum laude, 2009; Saint Louis University Law Journal, editor; Academic Excellence Awards for highest grades in Antitrust Laws, Business Associations, Constitutional Law, Contracts, Criminal Procedure and Property
Admitted2009, Missouri; 2009, U.S. District Court, Eastern District of Missouri; 2009, U.S. District Court, Western District of Missouri; 2014, U.S. District Court, District of Kansas; 2012, U.S. Court of Appeals, Eighth Circuit; 2013, U.S. Tax Court; 2011, Illinois

Professional Associations and Memberships

The Bar Association of Metropolitan St. Louis

•The Illinois Bar

•The Missouri Bar


Matt represents and advises clients in a wide variety of lawsuits and regulatory disputes across the United States. He is closely involved with the Government Compliance, Investigations & Litigation team and has experience defending against accusations of various forms of fraud, including securities fraud, healthcare fraud and money laundering. This practice has included many investigations by the Department of Justice and other government entities, some of which have been resolved without charges filed or other discipline imposed.

Matt also offers considerable civil litigation experience in Missouri and Illinois state courts in all stages of litigation, including discovery, motion practice, trial and appeals. He has served as counsel in jury and bench trials in Missouri and Illinois state and federal courts and has argued appeals before the U.S. Court of Appeals, Eighth Circuit. Matt has handled a range of complex commercial litigation and has achieved favorable outcomes for clients in alternative dispute resolutions such as mediation and arbitration.

Civic Involvement
•St. Louis University High School Alumni Board
•Young Friends of the Arc, nominating chair, 2012-present

• U.S. Attorney's Office, Southern District of Illinois, 2008
• The Hon. Audrey G. Fleissig, U.S. District Court, Eastern District of Missouri, 2008

Business Insights

Business Insights
4.02.14 Avoiding Privilege Pitfalls: Barko Calls for Caution
3.01.14 Federal Sentencing for Economic Crimes - Are We There Yet? Calculating Loss in Securities Fraud - Does the Modified Rescissory Method Fix the Broken Federal Sentencing Guidelines? Investigations Quarterly
1.14.14 For Whom the Bellwether Tolls: The Eighth Circuit Holds an Exemplar Trial May Qualify as a Civil Action to be “Tried Jointly” Under CAFA
Technology, Manufacturing & Transportation Blog
7.01.13 Sentencing and Restitution Issues in Criminal Tax Fraud Cases, St. Louis Bar Journal
1.01.09 The State of Affairs Regarding Counseling for Expectant Parents of a Child with a Disability: Do ACOG's New Guidelines Signify the Arrival of a Brave New World? Saint Louis University Law Journal

In The News
9.03.13 Six Attorneys Join Husch Blackwell's Government Compliance and Investigations Team in St. Louis, Kansas City
News Release


Documents by this lawyer on

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Providing Context to the Recent NY Times Article on the IRS’s Seizure of Bank Accounts
Matthew P. Diehr,Mark C. Milton,Matthew T. Schelp, December 8, 2014
A recent New York Times article contained anecdotes of several taxpayers having their bank accounts seized by the IRS even though they had not been convicted of any crimes. The article leaves the reader with the impression that taxpayers are helpless to defend against such action. While the New...
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Office Information

Matthew Paul Diehr

190 Carondelet Plaza, Suite 600
St. LouisMO 63105-3441


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