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About me

Mr. Armstrong has practiced criminal defense since 1978.  Few, if any, lawyers in Montgomery County can claim a better success rate in contested jury trials.  He is regarded as one of the finest cross-examiners in the courts in which he practices.  He has given seminars to his peers on various aspects of successful criminal defense.  He has won cases from murder to drunk driving, and everything in between.  He is regarded as one of the "go to" attorneys when you absolutely need the best, and has been recognized in Best Lawyers in America, Top Attorneys in D.C. Area, Top Attorneys in Maryland, Washingtonian Top Lawyers, Super Lawyers Md, and National Trial Lawyers Top 100 Trial Lawyers.  His passion is the defense of his fellow citizens and he champions the principle that no person should be deprived of his liberty until guilt has been proven beyond a reasonable doubt.  Only a vigorous and aggressive defense achieves this goal.  His willingness to try (and win) cases often helps him get the agreements he needs from the government in the cases that cannot be tried.  Equally importantly, he recognizes that many who come to see him are troubled and have issues that need to be addressed, and he pushes them to get the help they need. Not only does this  help solve their legal problems, but also it helps make their lives better on a personal level. 


Practice areas


  1. Criminal Defense: 100%



Fixed (always)

Attorney endorsements

3 total 

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  • Lawrence F Regan JR

    I endorse this lawyer.


    Lawrence Regan Bankruptcy and debt Attorney
    Relationship: Fellow lawyer in community

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    I highly endorse this lawyer. I am a former Assistant State's Attorney (prosecutor) in Montgomery County Maryland as was Mr. Armstrong. I have over 30 years of trial experience. I have worked with Mr. Armstrong where we represented and Co-Defendant in court cases over the years. I have also referred many people to him. He is an excellent trial lawyer and is well respected for his preparation, trial skills and courtroom demeanor by both lawyers and judges. If I were charge with a crime I would want him to defend me as opposed to any other attorney.


    Frank Coviello Personal injury Attorney
    Relationship: Worked together on matter

Contact info

Armstrong and Cheris

204 Monroe Street
Rockville, MD, 20850


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 100 Trial LawyersNational Trial Lawyers2011
Top Attorneys 2008-2011Washington DC Super Lawyers2008
Best Lawyers in America (top 5%)The Best Lawyers in America2007
Top Attorneys in Maryland 2007 to 2011Baltimore Super Lawyers2007
Top LawyersWashingtonian Magazine2004
Association namePosition nameDuration
Maryland Criminal Defense Attorney's AssociationBoard of Directors1984 - Present
National Association of Criminal Defense LawyersMemberN/A
Maryland Criminal Defense Attorneys AssociationPast President1991 - 1991
Maryland Criminal Defense Attorneys AssociationPresident-Elect1990 - 1991
Maryland Criminal Defense Attorneys AssociationVice President1988 - 1990
Legal cases
Case nameOutcome
Gregory Williams v. Marylandfleeing and eluding conviction reversed
See all legal cases 
School nameMajorDegreeGraduated
Georgetown University Law CenterLawJD - Juris Doctor1973
Yale UniversityN/ABA - Bachelor of Arts1968