About the Attorney

Walter Law Office is a trusted criminal defense attorney in Sioux Falls, South Dakota. Led by experienced trial attorney D. Sonny Walter, the law firm provides top-notch legal services for a wide range of criminal cases. With a strong track record of successfully representing clients in matters such as murders, homicides, DUIs, and more, Attorney Walter is dedicated to fighting for the rights of those facing criminal charges. Whether you are in need of legal advice or representation in court, Walter Law Office is here to help. Contact us today to schedule a consultation and learn more about how we can assist you in navigating the complexities of the criminal justice system.

Practice Areas

Criminal justice attorney

Client Reviews

shea oines

3/26/2026

Just when I thought I had hit a rough patch in life with a 2nd DUI, I did some research on some of the most respected attorneys in the state. Sonny was at the top of the list after reading all the 5 star reviews & raves about his knowledge in criminal law, I knew he was the right one to hire to represent my case…especially in a county where they tend to hand out harsh penalties. He went above and beyond my expectations and could not have asked for a better outcome! Just follow what he says throughout the process, and you’ll be more than pleased with the end results! Hands down THE BEST representation I’ve ever experienced. Thanks again, Sonny, for the time and effort put forth. Will definitely recommend him to anyone that ever needs ANY sort of legal help! A+++++