Criminal Defense And Civil Litigation In Maryland, Virginia And The District Of Columbia

More Than Two Decades Helping The Accused And The Injured

For more than 20 years, I have protected the rights of people accused of criminal activity or who suffered injuries in serious accidents.

For More than 20 Years

Trustworthy, Affordable And Caring Representation

I am C. Sei-Hee Arii, the founding attorney of Arii Law Firm, LLC in Rockville. For 20 years, I have successfully litigated criminal and personal injury cases. If you have been arrested for a traffic violation, criminal misdemeanors and felonies or have been injured in an accident or through medical malpractice, please contact Arii Law Firm, LLC for help.

I Will Not Give Up To Get A Second Chance

I believe that the rule of law is one of the hallmarks of democracy. However, the law is an imperfect instrument and justice is not guaranteed. I work to mitigate the many unfair things that can arise when the blunt instrument of the law strikes someone who has unique circumstances.

Everyone deserves a second chance. It is my job to protect the average person from the ruthlessness that can emerge when the law is applied heartlessly. I approach cases like a dog with a bone: I do not give up.

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Help Starts Here

Legal Services

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Defending you against misdemeanors and felonies including assault and battery, larceny, weapons crimes and more.

I will protect your driving privileges if you are charged with driving under the influence or driving while intoxicated.

From possession to manufacturing to trafficking, I will defend you against charges involving any controlled substance.

Injured in an accident? Seek the compensation that you deserve for medical bills, lost wages and pain and suffering.

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Years of Experience And Counting...

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Your Case Is In Good Hands

In my 20-plus years of practice, I have earned numerous honors and distinctions, including:


  • AVVO’s Superb 10.0 rating
  • AVVO’s s Clients’ Choice Award (2013-2019)
  • AV-Rated by Martindale-Hubbell, which is the highest level of professional excellence at which a firm can be ranked by its peers
  • Recipient of Martindale-Hubbell’s “Client Champion-Platinum” Award (2019)
  • Maryland and Washington, D.C. Super Lawyers® (2010-2020) (limited to 5% of Maryland and D.C. lawyers)
  • Rue Ratings’ Best Attorneys of America (2015-2019
  • Top 100 Trial Lawyers in Maryland” (2010-2019)
  • Top 100 Criminal Defense Lawyers in Maryland” (2013-2019)
  • Washingtonian Magazine’s Best Lawyers (2011-2012)
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C. Sei-Hee Arii
Rated by Super Lawyers

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COVID-19 Update


Arii Law Firm is open and available to take calls and consult by telephone.

For a fast response, please CALL or TEXT Attorney Arii at 240-621-0007.

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