criminal defense attorney in Topeka, KS

John Kerns, Esq.

At Mack & Associates, LLC you’re not just hiring an attorney, you’re hiring a team. Many circumstances fall into multiple categories of the law. We can provide crossover legal advice if necessary because of our attorneys’ range of experience in several practice areas. Our top-notch support staff keep our clients informed and on track. We operate efficiently to provide optimal service for you.

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Years in Practice

Areas of Focus

Criminal Defense

High Severity Level Felonies


Drug Crimes


(913) 800-8734

About John Kerns

For over 20 years John has been dedicated to criminal defense. John has conducted more than 60 felony jury trials to verdict in Federal and State courts (he stopped counting long ago) along with numerous misdemeanor trials. Raised in Kansas, John has strong ties to the Kansas legal community. During John’s career as a defense attorney, John has represented individuals charged with nearly every existing state and federal crime ranging from murder to low level misdemeanors.


  • Washburn University School of Law – J.D., top half of graduating class, 2001
  • University of Limerick – (Limerick, Ireland) Comparative Legal Studies Semester, 1999
  • University of Kansas – B.A., Environmental Studies, 1993

Bar Admissions

  • State of Kansas, 2001
  • United States District Court District of Kansas, 2001
  • United States Court of Appeals 10th Circuit, 2001


  • National Association of Criminal Defense Attorneys, Life Member
  • Kansas Association of Criminal Defense Attorneys, Life Member
  • National College for DUI Defense, General Member
  • Kansas Bar Association, Member

You can also find John on LinkedIn.

Office Locations

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  • Got the best possible outcome!!!

    John is guaranteed to fight for you until the bitter end! Never heard of an attorney fighting this hard. When i thought it was p er he proved it wasnt! Very happy indeed!

  • Highly recommend

    Mr Kerns was hired for representation on felony conspiracy charges. He has always been honest and available for communication. Mr Kerns did not try to just plea to move the case along in my opinion. Instead, he is fiercly fighting the prosecutor. By his conversations you can tell he is taking the time to read the reports, check out witnesses and all those other things attorneys are supposed to do for you. Whenever I call the office the sectetary usually patches me through to talk to him which Makes you feel important. I highly recommend Mr Kerns, he has done a good job for me.

  • Felony Drug Charges

    Mr. Kerns represented my son on a very unique case and was able to prove his innocence, as well as keep him in good standing with the college. John guided us through a complex situation with ease.

  • Criminal threat

    Mr. Kerns has a commanding presence in the courtroom. Each time i appeared before the judge i felt much better about the situation and more at ease. I know i got the best possible outcome with this charge. John always took my calls and eased my stress about this case.

  • Made The Right Choice

    John W. Kerns provided me with outstanding representation when I was charged with an OUI. He always made himself available whether it was via phone or email. He showed me that he worked very hard with my case and also displayed tremendous effort in reviewing all the evidence and materials. Mr. Kerns was able to get me the best possible outcome.

  • Awesome Attorney

    Mr. Kerns represented our son. We were very pleased with the successful outcome of his case. We were impressed with his representation and professionalism. He was very knowledgeable, helpful, and understanding. Hiring him was the best decisions we made. We would definetly recommend him!

  • very dissatisfied - 0 stars if I could

    Mr. Kerns was retained for defense. After initial discussion he was retained said he would follow up on the case status and let us know if a warrant was issued. Per his own testimony he never again called to determine if a warrant was issued. He took our money, did a brief amount of work at the outset, then per his testimony, never called again. A warrant was issued, of which we had no idea, as attorney did not follow-up at all. Months later went through a checkpoint and was arrested for this warrant. We were not able to show cooperation with the courts by turning in at courthouse, which had been discussed we would do if a warrant was issued. Would not recommend using him for any reason, for any price.

  • Definitely Recommend

    John is very accessible. I consulted with him and found him highly attentive and empathetic to my needs. He was very informative, but also seemed to genuinely want to help me. Hopefully I won't need him in the future, but was glad he was available when needed.

  • DUI Defense

    Very informative and up front with full representation of what I could expect every step of the way. Expertly handled all meetings and hearings with an active understanding of what was the most likely course of action and the appropriate steps to take. The breakdown of discovery was very informative and helped me make educated and informed decisions of which direction to take my defense. I came away from this with possibly the best result I could imagine so I absolutely recommend John Kerns.

  • Knowledgeable

    John was really helpful in providing me with what I needed to do and making sure the court process was as smooth as it can be and always there when I needed him. Thank you John

  • Wonderful and Excellent in every way. John Kerns truly fights for you.

    He is an outstanding attorney and works solely on your behalf. I reccomend John Kerns for any legal assistance you may need. He has surprised me in many ways. I am a happy client with a great outcome after a year of courtdates. I will retain him again for any and all future assistance with cases.

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