Northern Plains Justice, LLP

Firm Overview

Fighting for the rights of the good people of South Dakota is the focus our firm. Whether they are accused of a crime, hurt in an accident, seeking business litigation, are seeking family law dispute help, have lost a loved one in a wrongful death accident, or even need to contest the will of a lost love one, our South Dakota lawyers are here to fight for the great people of this state.

John Zimmer founded this firm following his association with the Bogue family, who has been practicing law here in South Dakota for over a hundred years. I joined the firm in 1992 and became a partner in 1996. Currently our firm has offices in both Sioux Falls and Parker, South Dakota. We are proud of the deep South Dakota roots of this firm.

Example cases

In the case of Schuh v. Heck Brokel, tried in Butte Country, South Dakota, a negligent truck driver struck our client while they were riding in a car. We were able to secure a $920,000 settlement for our client in that case.

We represented a client in a will contest case who alleged that there was undue influence in the matter of the Estate of Kenneth Thomas Duebendorfer. We took the case all the way to trial, with the jury ultimately siding with our client, returning over $400,000 back to the Estate of the deceased. The verdict was appealed all the way to the South Dakota Supreme Court, where they affirmed the original verdict in favor of our client.

Main Office
4301 W. 57th Street
Suite 121
Sioux Falls  SD  57108
  • (605) 361-9840
  • (605) 306-4100
  • (605) 271-7872
  • (605) 306-6278


Free Initial Consultation?
Yes, we offer every client a free consultation for however long it takes to get a proper handle on your specific case.
Services Offered For Fixed Fees?
We work on a contingency fee basis.
Hourly Rates
Contingency only.

Office Information

Office Hours
Monday through Friday
9:00 a.m. to 5:00 p.m.
Emergency After Hours

How did your firm decide on the primary area of practice(s)?

After working as the Turner County States Attorney for almost ten years, I knew my heart belonged in private practice.

What is your firm's point of view regarding clients educating themselves on legal issues?

The library portion of our website was created exclusively so prospective clients can educate themselves on the various legal issues and challenges they face in today's world.

Is your firm willing to review documents prepared by clients?

We will review any document a perspective client brings to us. We handle numerous business litigation cases, so documents provided by our clients have been instrumental in many of our legal victories.

Is your firm willing to coach clients who want to represent themselves?

I have been on both sides of the courtroom, trying cases as the State's Attorney and defending clients against accusations made by the state as a criminal defense attorney. We will work with clients who wish to defend themselves, but we do not advise it.

Jeffrey A. Cole

I joined Zimmer & Duncan, now Northern Plains Justice, as an associate attorney right after graduating from law school in 1992 and was made partner in 1996. Since then, I have also worked as a part-time prosecutor, having been appointed once (1995) and elected twice (1996, 2000) to serve as the Turner County States Attorney. I chose not to run for reelection in 2004 to focus on private practice law for Northern Plains Justice.Being raised on a farm has instilled in me a tremendous work ethic that powers everything I do. Having worked on both sides of the courtroom as a defense attorney and as the States Attorney allows me to truly see both sides of a case. That ability has served me well throughout my legal career.My strengths are in the areas of personal injury, civil litigation, ERISA cases, and criminal defense.Personal interests: I love driving my tractor on the farm I grew up on which my parents still own to this day. I would love to move back to the farm one day, but my wife Kim isn't so sure.
  • Bar Number: 3975
    South Dakota , 1992
  • University of South Dakota School of Law
    Juris Doctorate , 1992
    Vermillion, SD
  • South Dakota State University
    Bachelor of Science , 1988
    Brookings, SD
    History and Political Science

* Nolo has confirmed that every member attorney has a valid license and is in good standing with the state agency that licenses lawyers. Any past disbarments and suspensions (with possible exceptions for minor violations or nonpayment of dues, in our discretion) will be indicated accordingly in the badge. Member attorneys are required to notify Nolo immediately if they become the subject of any disciplinary action by any state licensing agency.