About
David G. Casey is a criminal defense attorney who represents people facing DUI Defense, Drug Crimes, and criminal matters. His work covers cases that can affect a client’s freedom, record, and future. He brings steady preparation, clear communication, and focused advocacy to defendants seeking guidance through Wisconsin criminal proceedings.
David earned a Bachelor’s degree in history with a minor in political science from Eastern Michigan University. He then earned a Juris Doctor from Thomas Cooley Law School in 2009. This academic background supports his careful reading of facts, statutes, and case details when preparing criminal defense strategies for clients.
David focuses his practice on criminal defense and works with matters ranging from misdemeanors to serious felonies. He is a member of the State Bar of Wisconsin, Marathon County Bar Association, and the Wisconsin and Marathon County Association of Criminal Defense Lawyers, showing his continued connection to the criminal defense community.
David has handled thousands of criminal cases, including drug possession, drug trafficking, sexual assault, domestic violence, computer crimes, and drunk driving offenses. He also served as President of the Marathon County Association of Criminal Defense Lawyers and was named a Rising Star by Wisconsin Super Lawyers in 2017 and 2018.
David helps clients by giving them a structured defense process during stressful charges. He reviews the allegations, explains possible risks, and works to protect their rights at each stage. His background with both lesser offenses and felony accusations allows him to address complex facts while keeping clients informed about their options.
David is recognized by clients for responsiveness, follow-up, and clear explanations. Those qualities matter in criminal cases because clients often need timely answers before court dates, negotiations, or major decisions. He aims to make the legal process easier to understand while preparing each defense with attention to the charges involved.
David G. Casey continues to guide people through criminal defense challenges with an emphasis on reliable service and strong preparation. From DUI Defense and Drug Crimes to serious felony allegations, he works to help clients understand the process, respond to accusations, and pursue outcomes that fit the facts and law.
Law Office Affiliations
- Partner, Crooks Law Firm S.C.
- Member, State Bar of Wisconsin
- Member, Marathon County Bar Association
- Member, Marathon County Association of Criminal Defense Lawyers
Licensed State
- Wisconsin
Education
- Thomas Cooley Law School
Juris Doctor (JD)
Awards & Badges

- Drug Crime
- DUI & DWI
- Expungement
- Sex Crimes
- Violent Crime




