“One in a million attorney; once in a lifetime individual.”

“Her knowledge, expertise, and professionalism saved my life.”

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Helping Good People Through Bad Situations

A DUI/DWI can change your life—but a good lawyer can help. Sei-Hee Arii has been specializing in DUI/DWI cases for over twenty years. We keep up with current training on DUI/DWI, including training very similar to what police get, which helps us to understand your situation and protect you. If you have been arrested for traffic misdemeanors such as DUI or DWI and Driving on a Suspended License; criminal misdemeanors such as Assault and Battery, Drug Possession and Distribution; or have been injured in an automobile accident, please contact me, C. Sei-Hee Arii, at Arii Law Firm, LLC.

Client Testimonials

Your Case Is In Good Hands

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C. Sei-Hee Arii

About Sei-Hee Arii

Sei-Hee has been a litigator focusing on serious traffic and civil cases in Maryland, D.C., and Virginia for over 20 years. She has received a variety of awards in recognition of her skills and been placed on numerous “best of” lists. She has received AVVO’s Superb 10.0 rating and its Clients’ Choice Award for ten years running(2013-2023). 

Sei-Hee is AV Rated by Martindale-Hubbell, which is the highest level of professional excellence at which a firm can be ranked by its peers, and is a recipient of their “Client Champion-Platinum” Award (2019-2023).

In addition, Sei-Hee has been selected for inclusion in the following lists:

  • Rue Ratings’ Best Attorneys of America (2015-2023)
  • Maryland and Washington, D.C. Super Lawyers® (2010-2023) (limited to 5% of Maryland and D.C. lawyers)
  • The National Trial Lawyers “Top 100 Trial Lawyers in Maryland” (2010-2023)
  • The National Trial Lawyers “Top 100 Criminal Defense Lawyers in Maryland” (2013-2023)
  • Washingtonian Magazine’s Best Lawyers (2011-2012).

Learn more About Sei-Hee

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    Arii Law Firm: Where Exceptional Skill Meets Compassionate Advocacy.

    Over 20 Years of Experience Defending the Accused

    Numerous Prestigious Awards

    Highly Rated by Former Clients

    Gives Personalized Attention to Each Unique Client

    Affordable Attorney with a Proven Track Record

    C. Sei-Hee AriiClients’ ChoiceAward 2025 Top Attorneys in Maryland Top Attorneys Washington Super Lawyers Rue Ratings NCDD Martindale-Hubbard Platinum Washington Top Lawyers National Trial Lawyers FindLaw Network Martindale