Justice, Value, Integrity

Sioux Falls Criminal Defense Lawyer

When you go with DeMatteo Law Firm, you get Justice, Value, and Integrity. We are advocates for justice when you are facing serious criminal charges under South Dakota law.

We want our 16 years of experience to be accessible to you. We keep our rates affordable, and you can text or call your attorney when you need them most. DeMatteo Law Firm will always be there for you and keep you informed on all developments of your case.



  • Murder/Homicide
  • Manslaughter
  • Vehicular Homicide/Battery
  • Kidnapping
  • Rape/Sex Crimes
  • Aggravated Assault
  • Simple Assault, Domestic and otherwise
  • Robbery
  • Drug charges including possession/distribution/manufacturing
  • Driving Under the Influence
  • White Collar Crimes
  • Grand Theft, all theft crimes
  • Probation violations
  • Violations of no contact orders
  • Neglect and abuse




Lyndsay, at DeMatteo Law Firm, is amazing! She’s compassionate about what she does and takes the best care of her clients. Whenever I needed her, she … Read more
Cassie Mehlbrech
Lyndsay was so helpful in helping us deal with a guardianship situation. She made it so easy and seamless for all of us. She is responsive, knowledgea… Read more
Eva Hofer
Ms Dematteo is amazing and tells it like it is. She is always helpful in legal matters especially family!
Crystal McWilliams
Lyndsay DeMatteo – is an excellent Attorney, She has helped us with multiple legal issues including Family Court, Juvenile and creating legal document… Read more
Jennifer Watkins
My experience with DeMatteo Law Firm has been phenomenal! Lyndsay is genuine and personal. I have been going through quite tough times and she helped … Read more
Greta Benton

Free Resource

Free Resource

Pulled Over?
Hand the officer this! (Cut this out and keep this in your glovebox.)