Federal and State Criminal Defense Attorney - DWI, Drugs, Assault, Theft and all criminal offenses


Years of Experience

Welcome to Walter Law Office - Criminal Defense Law Firm

An attorney’s job is to provide information and advice on the pros and cons of a particular course of action in a case. This counsel helps the client decide on the best approach to take.

In some situations, the client needs to make the decision on whether to try the case to a jury or enter a plea. A sound decision only happens after the lawyer gives a full explanation of the options, and the client has received and reviewed all the information in the case. That is why it is important that a lawyer is strategic and experienced when it comes to advising a client.

With Walter Law Office, you get a skilled lawyer who is not afraid to take your case to trial. He will not plead someone guilty because of the “fear” of trying a case. Rely on him to provide sound legal advice or to represent you in the court of law. Rated in 3 best rated Criminal Defense Lawyers, Call Sonny for a free phone consultation.


D. Sonny Walter has more than 30 years of experience in handling all kinds of criminal cases. These include driving under the influence (DUI), driving while intoxicated (DWI), possession and distribution of controlled substances, and many more. Learn more about him.

Jury Ready

D. Sonny Walter has represented clients in jury trials in just about every type of criminal case there is. Throughout his career, he was won most of these cases. Find out the areas he has worked on.


D. Sonny Walter is someone who is respected in his practice. He has been elected by his peers to be the East River Coordinator for the South Dakota Association of Criminal Defense Lawyers for multiple terms. Read his published articles and see why he is esteemed by his fellows. 

Practice Areas

As a criminal defense attorney, D. Sonny Walter has handled a wide variety of cases throughout his years in practice. Some of these include:

  • Murder
  • Attempted Murder
  • Homicide
  • Vehicular Homicide
  • Vehicular Battery
  • Kidnapping
  • Manslaughter
  • Aggravated Assault
  • Distribution, Manufacturing and and Possession of Controlled Substance
  • Simple Assault Domestic Violence
  • DWI, DUI, Driving Under the Influence, 1st, 2nd, 3rd, 4th, 5th and 6th Offenses
  • Robbery and Attempted Robbery

He has been practicing law all over South Dakota,  in  Sioux Falls, Minnehaha County, Lincoln County. Brookings, Yankton, Union, and Moody counties among many other counties in East River, South Dakota. In addition, he handles criminal cases in Federal Court.

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Turn to a trustworthy criminal defense lawyer to assist you with your case. Contact Attorney D. Sonny Walter or Max Walter for any inquiries.