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About me

John T. Bayer is an experienced trial lawyer who is truly passionate about advocating on behalf of his clients. John has dedicated his career exclusively to advising and counseling individuals who have been arrested for OWI. To ensure the best defense, John keeps up-to-date with the latest forensic science concerning breath and blood tests.

John Bayer grew up in Green Bay, Wisconsin. After graduating with his B.A in English from the University of Wisconsin-Madison in 2006, John earned his law degree from Marquette University Law School in 2009. He continued to go on and passed the California State Bar Exam.

John started his practice in Milwaukee, where he has established himself as a zealous advocate for his clients. John not only represents OWI clients locally, but throughout Wisconsin. He is a valued member of the Wisconsin Association of Criminal Defense Lawyers, as well as the National College of Drunk Driving Defense. His membership to the NCDD keeps him continuously collaborating with the best drunk driving defense lawyers in the Nation.


Practice areas


  1. DUI & DWI: 100%
    6 years



Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

13 total 

Are you an attorney? Endorse this lawyer

  • Daniel R Skarie

    I met John at the annual Wisconsin drunk driving defense seminar. I was instantly impressed with his knowledge of OWI defense and passion for defending his clients. John is an attorney I have no hesitation contacting to discuss difficult cases and OWI related issues.


    Daniel Skarie DUI and DWI Attorney
    Relationship: Fellow lawyer in community

  • Jared M. Nusbaum

    I know John to be a passionate advocate and representative for his clients. I have personally referred clients to John and those clients have always been completely satisfied with his representation. John is a hard-working, intelligent attorney who fights for the people he represents. I endorse this attorney.


    Jared Nusbaum Litigation Attorney
    Relationship: Friend

Contact info

Law Offices of John T Bayer

230 W Wells St
Suite 706
Milwaukee, WI, 53203


WIGood Standing200903/27/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
DWI: Defending With IngenuityNCDD and NACDL2014
Annual Drunk Driving Defense SeminarBarry Cohen S.C.2014
Annual Drunk Driving Defense SeminarBarry Cohen S.C.2013
DWI: Defending With IngenuityNCDD and NACDL2012
Annual Drunk Driving Defense SeminarBarry Cohen S.C.2012
Annual Drunk Driving Defense SeminarBarry S. Cohen SC2011
BYP: Handling OWI Cases in WisconsinState Bar of Wisconsin2011
18th Annual Mastering Scientific Evidence DUI/DWITexas Criminal Defense Lawyers Association2011
Annual Drunk Driving Defense SeminarBarry S. Cohen SC2010
Advanced Cross Examination: the Next GenerationState Bar of Wisconsin2010
BYO Handling OWI Cases in WIState Bar of Wisconsin2010
Work experience
TitleCompany nameDuration
Solo PractitionerLaw Offices of John T. Bayer2010 - Present
Legal InternMcCormick Law Office2010 - 2010
Contract AttorneyLaw Offices Of Andrew Mishlove2010 - 2011
Legal InternLegal Aid Society Of Milwaukee2008 - 2008
Association namePosition nameDuration
National College of DUI DefenseMember2011 - Present
Wisconsin Association of Criminal Defense LawyersMember2011 - Present
Legal cases
Case nameOutcome
City of Mequon v. ______ (First and Last Names Withheld)Refusal, OWI, and PAC dismissed
State of Wisconsin v. George _____ (Last Name Withheld)Prior offense was thrown out and the prosecutor dismissed both the OWI and PAC charges.
State of Wisconsin v. Andrew ____ (Last Name Withheld)OWI and PAC charges were dismissed.
See all legal cases 
Publication nameTitleDate
OWI Lawyer Wisconsin BlogYour Constitutional Right to an Attorney in OWI Cases: Attacking Prior Convictions2015 A Gannett companyLegal Manuever Drops Prior OWI Offenses for Some2014
School nameMajorDegreeGraduated
Marquette University Law SchoolLawJD - Juris Doctor2009
University of Wisconsin, MadisonEnglishBA - Bachelor of Arts2006
National College of DUI DefenseDUI DefenseMastering Scientific EvidenceN/A
Wisconsin Annual Drunk Driving Defense SeminarOWI/DUI DefenseN/AN/A
Nation College of DUI DefenseOWI/DUI DefenseN/AN/A
National College for DUI DefenseDWI: Defending with IngenuityDUI DefenseN/A