DUI - DWI - OWI- Drunk Driving - Felony - misdemeanor - Cannabis Marijuana Law
2836 W. Jefferson Ave. ​ Trenton, MI  48183  - WAYNE COUNTY 

DISCLAIMER: This entire website should be strictly used as informational purposes only. It is not to be construed as legal advise or as a legal consultation since each individual case is unique. Check this website periodically for updates. 

Synopsis of John Knappmann's work experience and accolades:

*National College of DUI Defense.

​*25 years of local government service, receiving 'Wayne County Award of Recognition'.

*12 years Wayne County Assistant Prosecutor (& litigation).

*Currently owns and is active at Law Offices of John O. Knappmann, in downtown Trenton, MI. with a specialty in Criminal Defense law.

*Member of Criminal Defense Attorneys of Michigan.

*Member of Michigan Association of OWI Attorneys.

*Member of State Bar of Michigan—Criminal Law Section.

*Member of State Bar of Michigan—Property Section.

​​*Previously was an executive responsible for Government Relations & Special Projects.

*Performed extensive work in conjunction with Corporation Counsel.

*Performed extensive work in conjunction with  the Planning Commission.

*Performed extensive work in conjuction with the Downtown Development Authority.

*Performed extesive work in conjunction with the  Zoning Board of Appeals. 

*Wayne County Board of Canvassers member (Formally certifies the local polical elections).

*Member of Wayne County Real Estate Investors Association.

*Trustee of Charter Township of Brownstown, MI.

He is a member of the State Bar of Michigan and the Criminal Law. He teaches on criminal law and organizational behavior at a college level. John Knappmann also attends continuing legal education to keep constantly updates with the current federal and state laws and processes which are ever-changing. (Continuing legal education is not mandatory amongst practicing attorneys).

John is a proud graduate of the University of Michigan-Dearborn and Michigan Law School. He is married with three children and lives in Brownstown, Michigan, where he currently serves on the Planning Commission, in addition to his full-time legal practice specializing in criminal defense and real estate law.

John attends church regularly with his family. He currently is a basketball & soccer coach for his children at St. Marys School. He is also an active member of the local Down River Germania Club, Wayne County Board of Canvassers member (formally certifies the local political elections), and he is active at the Wayne County Art Authority (treasury funding the Detroit Insitute of Art, DIA).

John Knappmann

Over 25 years as an attorney in Wayne County with soli 25 years of  litigation experience.


With more than 30 years of experience, John Knappmann, Criminal Defense Attorney, has extensive first-hand experienced in criminal defense and civil law. Mr. Knappmann is a 12 year Former Wayne County Assistant Prosecutor and Litigator of 12 years and has tried hundreds of criminal cases throughout his legal career. He has a rare unique advantage from a prosecuting insider's perspective and has formed working relationships within court system. John Knappmann knows the interworkings of the prosecuting law regarding DUI’s, DWI’s and OWI’s in Michigan and on a federal level (especially when you cannot get an expungement for any DUI DWI or OWI in the state of Michigan). He knows exactly how to present you, protect your legal rights, your reputation and he will utilize every current law to your best advantage for the best possible outcome for your legal case.

John Knappmann has another advantage that other attorneys do not have. Mr. Knappmann has vast experience working directly within the various branches government. He is very familiar with the inner-workings of the government, honed his professional skills and possesses a unique familiarity with the halls of government where he has created many liaisons.​​

OFFICE: (734) 931-0440   FAX (734) 224-6126​  EMAIL: John@KnappmannLaw.com
Drunk Driving
Cannabis / Marijuana law
Felony /misdemeanor