William F. O'Sullivan, Criminal Defense Attorney in Kansas City, Missouri
Over 54 years of legal practice · focused on Criminal Defense and Personal Injury · 4.4/5 rating from 1 verified client review
MemberatWilliam F. O'Sullivan, Attorney at Law
Kansas City, MO
Practicing criminal defense in Kansas City since 1972.
- 54+
- Years practicing
- 4.4 ★
- 1 client review
- 1
- Bar admission
Practices in
Are you William F. O'Sullivan?
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Quick answer
William F. O'Sullivan is a member based in Kansas City, MO. The practice focuses on Criminal Defense and Personal Injury. William has over 54 years of legal experience. Currently practicing at William F. O'Sullivan, Attorney at Law. Rated 4.4 out of 5 from 1 client review.
- Based in
- Kansas City, MO
- Experience
- over 54 years
- Known for
- Criminal Defense · Personal Injury
- Handles Criminal Defense and Personal Injury matters from Kansas City, MO.
- Over 54 years of practice as a licensed attorney.
- Recognized with BV Distinguished.
About William F. O'Sullivan: William F. O'Sullivan is a member based in Kansas City, MO. The practice focuses on Criminal Defense and Personal Injury. William has over 54 years of legal experience. Currently practicing at William F. O'Sullivan, Attorney at Law. Rated 4.4 out of 5 from 1 client review.
Areas of practice
Practice areas handled by William F. O'Sullivan
William concentrates on criminal defense and personal injury. Each area below outlines the kind of case William handles, typical outcomes to expect, and how the intake process starts.
Criminal Defense
View other Criminal Defense attorneys
Personal Injury
View other Personal Injury attorneys
Criminal Defense cases in Kansas City, Missouri
William takes criminal defense matters in Kansas City, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Personal Injury cases in Kansas City, Missouri
William takes personal injury matters in Kansas City, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Biography
About William F. O'Sullivan — Over 54 years of Missouri criminal defense experience
William F. O'Sullivan is a member based in Kansas City, MO. The practice focuses on Criminal Defense and Personal Injury. William has over 54 years of legal experience. Currently practicing at William F. O'Sullivan, Attorney at Law. Rated 4.4 out of 5 from 1 client review.
William F. O'Sullivan is a lawyer practicing criminal defense law, personal injury law. William F. has been licensed for 54 years. William F. practices at William F. O'Sullivan, Attorney at Law in Kansas City, MO.
How William handles criminal defense matters
William F. O'Sullivan is a lawyer practicing criminal defense law, personal injury law. William F. has been licensed for 54 years. William F. practices at William F. O'Sullivan, Attorney at Law in Kansas City, MO.
Who William represents
William reviews new inquiries case-by-case for criminal defense and personal injury matters in Kansas City and the surrounding Missouri area.
Jurisdictions
William's state bar admissions
Missouri
1972 · ACTIVE
Recognition
Awards, publications, and recognition of William F. O'Sullivan
William has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
BV Distinguished
Legal awards and honors
BV Distinguished.
Locations
William F. O'Sullivan's office in Kansas City
William's primary office is at 7225 Belleview Ave., Kansas City, MO, 64114. In-person meetings are by appointment; a phone intake usually comes first.
William F. O'Sullivan, Attorney at Law
7225 Belleview Ave.
Kansas City, MO 64114
Open in Google MapsClient feedback
Client reviews of William F. O'Sullivan — 4.4/5 rating from 1 verified client review
Every review below is from a verified client of William. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing criminal defense attorneys in Kansas City.
4.4
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once William F. O'Sullivan claims this profile.
Read all reviewsHiring guide
How to hire William F. O'Sullivan — what to expect in your first consultation
Working with a new criminal defense attorney should feel structured. Here's how the first two conversations with William usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
William charges for the initial consult. That fee is credited toward representation if you retain William's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; William will tell you what matters and what doesn't.
Questions to ask a criminal defense attorney in Kansas City, Missouri
A short list to run through before you commit: How many criminal defense matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for William
William discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in criminal defense practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every criminal defense matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. William confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
William's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many criminal defense practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about William F. O'Sullivan
How much does it cost to hire William for a criminal defense case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. William walks through the likely range during the consult so there are no surprises.
Does William offer a free consultation?
William charges for the initial consult; that fee is credited toward representation if you retain William's office. Some criminal defense attorneys offer free consults — check William's current terms during booking.
How long do criminal defense cases in Missouri typically take?
Simple criminal defense matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. William gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can William take my case if I'm outside Kansas City?
William is licensed in Missouri. Matters governed by Missouri law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — William will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with William?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. William will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is William accepting new criminal defense clients right now?
William's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Criminal Defense attorneys serving Kansas City, St Louis and Jefferson City in Missouri
William handles criminal defense matters throughout Missouri. Each city below is a direct link into the search page for verified criminal defense attorneys in that community.
More counsel
Other top-rated criminal defense attorneys in Missouri
If William's intake is full or the fit isn't right, these criminal defense attorneys in Kansas City handle similar matters. Every profile below is verified and open to consultations.





