John Wilka

John Wilka

(605) 338-9711 300 N. Dakota Ave.
Sioux Falls, SD 57104
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Sioux Falls Dui Lawyer

Hours | Mon-Fri 9am-5pm or by appointment

Sioux Falls DUI Lawyer

Sioux Falls South Dakota DUI Lawyer John Wilka


(605) 338-9711

Sioux Falls South Dakota DUI Lawyer

Law Office of John Wilka
300 North Dakota Avenue
Suite 609
Sioux Falls, SD 57104

Law partners, John M. Wilka and Mark James Welter, have over 40 years of combined legal experience.  They are experienced, aggressive and accomplished.  “We built our practice on relentlessly pursuing justice for our clients,” says Welter.  “Our goal is to prepare every case as if it is going to trial.”  The firm meticulously strives to give clients premier legal service throughout their case. With only two attorneys each client is given the personal attention and focus that their case deserves.  Wilka and Welter focus’ their practice in personal injury and workers’ compensation injury cases, criminal defense, family law, and civil litigation.

John Wilka has lived in Sioux Falls his entire life.  John has tried hundreds of cases in his 20 years of trial law and his experience speaks for itself.  Mark Welter has lived in South Dakota his entire life.  Mark worked for two years as a law clerk for the U.S. District Court, District of South Dakota, Southern Division.  Mark then worked for 15 years in a large insurance defense law firm, where as a partner he represented insurance companies and successfully tried many personal injury and worker’ compensation cases, and handled many injury appeals. Mark brings that invaluable experience and knowledge with him, which gives Wilka and Welter an advantage of which few law firms can boast. Mark blends his knowledge, skill, experience, tenacity, and compassion to win justice and compensation for individuals and the families of victims who suffer from serious injuries.

Injury Cases

At Wilka and Welter, we understand that an injury can be serious, painful, permanent, and disabling. We understand that an injury, through no fault of your own, can cause you physical and emotional suffering, loss of time from work, the need for expensive medical care, and economic hardship. Such an injury can result in permanent medical impairment, and can substantially impact your daily social, recreational, and work activities, and cause you and your family loss of enjoyment of life.

If you have been injured, you need an experience trial attorney working hard for you. We know how to put your case together to get you the compensation to which you are legally entitled.

Criminal Defense

Wilka and Welter, LLP understand that we do not live in a perfect crime-free society. Unfortunately, however, the legal system sweeps up some innocent people in its search to find justice. We are committed to protecting those individuals’ rights under the law until they proven guilty and after.

If you have never faced criminal charges before, you may not be aware of the legalities of the criminal process and the repercussions you may face. Wilka and Welter can help you understand the charges filed against you, your available defenses, the plea bargains that may be offered, and the penalties and fines you may expect if you are convicted. The most important thing to keep in mind if you are facing a criminal charge is that you have the right to remain silent and should exercise that right. You should also retain legal counsel as soon as possible to protect your rights.

Family Law

Family law, also known as matrimonial law or the law of domestic relations is often stressful. We know that family relationships and the legalities that govern them can be difficult to understand. We are here to make those legalities as easy as possible for you so you can focus on your family.

When people need information on family law, it is usually because they are considering or already going through a significant life change. Whether it is a happy event such as getting married or adopting a child, or an unfortunate event such as divorce or domestic abuse—family law can be complex and more complicated than expected. Knowledge of the law will not eliminate all the anxieties that may accompany a legal issue but seeing a lawyer can aid you in understanding your legal situation and will help prepare you for any problems that you may face.


    I handle many types of criminal cases including Drinking and Driving (DWI / DUI) and Traffic Offenses.
    You want an experienced trial attorney who will personally handle your file. I will not hesitate to go to trial on your case; that decision, however, will ultimately be yours.
    I will  personally communicate with you. If I am in Court when you call, you can leave a message with my receptionist. I personally guarantee you will hear back from me in 24-hours or less. My office phone is (605) 338-9711
    My level of experience, knowledge of the law, and personal familiarity with the judges, prosecutors, and system is a great advantage. In addition, my personal and regular contact with clients, availability and involvement with every aspect of the case allows me to obtain the most favorable results.
    Depending on the type of case I like to find out as much as I can about the facts of the case and talk to anyone who can help our defense. At that time we can discuss our options. The stronger our defense appears to the prosecutor, the better our chances are of getting a favorable result.
    Call for a consultation at (605) 338-9711, during which I can answer all of your questions..


Do You Need a Lawyer?

Every state has some sort of "drunk driving" statute. The term "drunk driving" is in quotes because none of these laws require that you be "drunk" or "intoxicated" to be guilty. All that is required is that your ability to operate a vehicle has been impaired to any extent at all or that your Blood alcohol level exceeds the state limit (which is now .08% in all states). Some states call it DWI (Driving While Intoxicated), but it refers to the same offense. The consequences of differ drastically from state to state and are influenced by your age, blood alcohol limit (BAC), whether you have been arrested for in the past, and whether you caused injury or death during the .

A Lawyer can help...

Assess your legal situation

An experienced Defense lawyer can help you understand what you are up against and the fines you may be required to pay. A lawyer mostly deals with matters and knows the process inside and out – including options that a public defender may not tell you.

Explain the consequences

The consequences of a vary greatly from state to state and a lawyer will be able to explain how those consequences in your state apply to you such as (1) harsher punishments for those arrested with BAC limits over .08, (2) special laws for underage drivers arrested for , (3) possible community service or plea bargaining, (4) overlapping jurisdiction of Courts and your state's motor vehicle licensing department to suspend or revoke your license, and (5) contingent license programs that allow you to use your vehicle to get to and from work.

Manage the process

Dealing with the motor vehicle department can be frustrating and time consuming. A Lawyer can manage the process for you by completing the required forms; making phone calls; scheduling and/or representing you at a Motor Vehicle Department suspension hearing, and making other necessary arrangements.

Represent you in court

An experienced Lawyer knows the ins and outs of the courtroom and may be able to obtain a lesser sentence for you if your situation and state law allows for it.

Don't know if a Lawyer is right for you? Here are some general guidelines:


Definitely hire a Lawyer if you already have several 's and receive another; or if your arrest was the result of an accident or if anyone was injured; or if you are a professional driver whose livelihood depends on keeping your license.


Seriously consider hiring a Lawyer if you've been arrested for a second (in the same or another state) or were arrested with a BAC limit over double the legal limit as harsher penalties may apply.


You might want to hire a Lawyer if you don't understand your rights or laws, what you need to do, or the consequences you face. You also might want legal representation if you are in a profession (or plan to be) that requires bonding or in which any criminal conviction might prevent you from getting or keeping a professional license. If you don't know the requirements, then you need expert advice before handling the case yourself.

 Lady of Justice

Legal Disclaimer: The information above presented as an advertisement. This website is provided solely for informational purposes and is not intended to create an attorney-client relationship between you and the attorneys. Any form of communication with us does not create or establish an attorney-client relationship.


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