oak brook criminal defense attorney

Defend Your Future.

Oak Brook criminal defense attorneys serving those charged in DuPage, Cook, and Kane County.
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5 Star Defense Services

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"Highly highly recommend Mike! I can't even begin to explain how he has saved us on several occasions with small and very very large issues. We have had some bad luck but he amazes me every time with the BEST outcomes."

"Mike is professional and personable. He has beat or helped me get the best sentencing for any case I have hired him for. I have two cases dismissed and a felony that got knocked down to a misdemeanor solely because of Mike."
"If you want the best defense attorney in the state... Look no further than Michael McMahon. Top Tier Lawyer... don't waste your time or money with anyone else... secure the best!! Mike and his team are #1!!"
"Michael McMahon is a phenomenal attorney whose confidence and seasoned ability puts you immediately at ease. This is a guy who is the best of the best."
"Absolutely fantastic services and pricing! Mike and Jessica were absolutely amazing people to work with and helped me with two pretty bad traffic tickets. Thank you so much 10/10 recommend!"
"Mike did a fantastic job with my son's case! This was a very unusual unique & complicated case. He knew all the right people to get ahold of on both sides he worked out a fair case. I’m very appreciative for his fast action!"

Why mcmahon?

Relentless Criminal Defense.

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A former judge and prosecutor ready to fight for you.

Unique insider knowledge of the court system and prosecution tactics to build your strongest possible defense.

Available 24/7 and offering flexible payment plans.

Immediate assistance when you need it most, with financial options that make quality representation accessible.

Thousands of criminal cases handled in Illinois.

Proven track record of successful outcomes across all types of criminal charges throughout Illinois.
practice areas

Misdemeanor and Felony Defense.

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our attorneys

Experienced. Respected. Responsive.

Learn More About Our Attorneys

Michael McMahon

Founder and attorney. Former prosecutor turned criminal defense attorney.

Cary B. Pierce

Criminal defense attorney. Former judge turned criminal defense attorney.
how to work with us

Working With Us is Simple.

Schedule a Free Consultation
1

Give us a call

Call 630.953.4400 for a free consultation.
2

Put a plan in place

Gain clarity on your next steps.
3

Defend your future

Access top-tier Illinois defense services.

Put Your Legal Troubles Behind You.

To schedule your free consultation, please fill out our contact form. You can also call 630-953-4400 or email info@mcmahonlegal.net.

We are located at:

2150 McDonald Drive
Oak Brook, Illinois
60523

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