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About me

 Thomas Hagen is partner at Rosengren Kohlmeyer Law Office Chtd.  Mr. Hagen has extensive experience in criminal defense, family law and bankruptcy.  His impressive track record in State and Federal Court is undeniable.

His credentials include being named a “Rising Star” by Minneapolis-St. Paul Magazine for the past two years.  This award is limited to the top 4% of lawyers under the age of 40 in the state of Minnesota.  Mr. Hagen is a member of numerous professional associations including the American Bar Association, Minnesota State Bar Association, 6th District Bar Association and American Bar Association.  He has been interviewed by many of the largest newspapers in the nation including, The New York Times and USA Today a well as the Minneapolis StarTribune.  In 2012 he became a published author.  His book titled, “Arrested for DWI in Minnesota” lay the foundation for a non-lawyer to survive after being charged with a DWI in Minnesota and is available from Amazon.Com both in hardcopy and in kindle format.


Photos and videos

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Practice areas


  1. DUI & DWI: 50%
    9 years
  2. Criminal Defense: 40%
    9 years
  3. Family: 10%
    9 years



Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

7 total 

Are you an attorney? Endorse this lawyer

  • Kathryn Karjala-Curtis

    Tom is an excellent trial attorney who tells you like it is and fights tirelessly for his clients.


    Kathryn Karjala-Curtis Criminal defense Attorney
    Relationship: Worked together on matter

  • No photo

    I endorse this lawyer. Mr. Hagen is a phenomenal attorney that takes a direct approach to his cases and provides top-notch assessments and legal advice. He is well respected in his field and is highly regarded as a top criminal defense attorney.


    Jeremy Alm Divorce and separation Attorney
    Relationship: Worked for lawyer

Contact info

Rosengren Kohlmeyer & Hagen

150 St. Andrews Court
Suite 110
Mankato, MN, 56001


MNAuthorized to practice200706/15/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarLaw & Politics Magazine2016
Rising StarLaw & Politics Magazine2015
MemberNational College for DUI Defense2015
Top 100 DUI Attorneynafdd2014
Rising StarLaw & Politics Magazine2014
10 BestAmerican Institute of DUI/DWI Attorneys2014
Top 100 Trial LawyersNational Trial Lawyers2014
Top 40 Lawyers Under 40American Society of Legal Advocates2013
Rising StarMinnesota Law & Politics Magazine2013
Forensic ToxologyToxicology Laboratories Inc.2012
Rising StarMinnesota Law & Politics Magazine2012
Work experience
TitleCompany nameDuration
PartnerRosengren Kohlmeyer2010 - Present
AssociateCalvin Johnson Law Firm2007 - 2010
Legal InternAgStar2006 - 2006
Association namePosition nameDuration
National College of DUI DefenseMember2014 - Present
Minnesota Association of Criminal Defense LawyersMember2013 - Present
American Bar AssociationMember2012 - Present
American Bar Association, Young Lawyers DivisionMember2012 - Present
Minnesota Children's Justice InitiativeMember2011 - Present
American Bar AssociationMember2010 - Present
Minnesota State Bar AssociationMember2007 - Present
6th Judicial District Bar Association - Young LawyersMember2007 - Present
Janesville Youth BasketballCoach2007 - 2010
Legal cases
Case nameOutcome
State v. A.B. (Brown County 2010)Dismissed
State v. M.M. (Waseca County 2009)Not Guilty
State vs. A.B. (Waseca County 2008)Not Guilty
See all legal cases 
Publication nameTitleDate
BookArrested For DWI in Minnesota2013
Mankato Free PressMan sues Blue Earth County to get back cash seized in drug raid2012
Mankato Free PressCustody Case Sent Back to Court2011
Mankato Free PressEvidence Shows Rape Allegations False2010
USA TodayMinn. boy mom who dodged chemo return2009
New York TimesWarrant Lifted in Cancer Case2009
School nameMajorDegreeGraduated
Ohio Northern University - Claude W. Pettit College of LawLawJD - Juris Doctor2007
Minnesota State University, MankatoPolitical ScienceBA - Bachelor of Arts2004
Speaking engagements
Conference nameTitleDate
Criminal LawCriminal Law2014
Janesville Rotary ClubHonors Banquet2011
SpeakerSouth Central College2009
Southern MinnesotaMinnesota State Mock Trial Judge2009