Atty. William Timothy O'Brien

Atty. William Timothy O'Brien

William Timothy O'Brien is a lawyer practicing criminal prosecution. William received a B.S.B.A. degree from John Carroll University in 1981, and has been licensed for 42 years.

Chicago Chicago 42 yrs experience 42 year
Call (312) 463-9058 Book Appointment

Profile Summary

About William Timothy O'Brien at a glance

William Timothy O'Brien is an Asst. States Atty. based in Chicago, Illinois. They have 42+ years of legal experience, licensed to practice since 1984. Their practice focuses on criminal defense. Admitted to practice in Illinois (1984). Educated at Chicago-Kent College of Law (J.D., 1984) and John Carroll University (B.S.B.A., 1981). Recognitions include AV Preeminent. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Timothy O'Brien is a lawyer practicing criminal prosecution
  • William received a B.S.B.A. degree from John Carroll University in 1981, and has been licensed for 42 years
  • William practices in Chicago, IL

Practice Areas Explained

William Timothy O'Brien's Areas of Practice

Each practice area below reflects the types of cases William Timothy O'Brien handles, with a brief overview of what that area of law covers.

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

William Timothy O'Brien is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about William Timothy O'Brien

Where is William Timothy O'Brien's law office located?
William Timothy O'Brien's law practice is located in Chicago, Illinois. You can contact the office directly through this profile page.
What practice areas does William Timothy O'Brien handle?
William Timothy O'Brien focuses on criminal defense. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has William Timothy O'Brien practiced law?
William Timothy O'Brien has 42+ years of legal experience and has been licensed since 1984.
Where did William Timothy O'Brien go to law school?
William Timothy O'Brien earned their education at (J.D., 1984); (B.S.B.A., 1981).
How can I contact William Timothy O'Brien for a consultation?
You can contact William Timothy O'Brien directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has William Timothy O'Brien received?
William Timothy O'Brien's notable recognition includes: AV Preeminent.

Practice Areas

Education

J.D.
Chicago-Kent College of Law
- 1984
B.S.B.A.
John Carroll University
- 1981

Awards

AV Preeminent

Bar Admissions

Illinois
Admitted: 1984

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