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Robert Charles Bonsib

About me

As a criminal defense attorney, I offer legal representation to individuals and organizations under criminal investigation or facing criminal charges in the federal courts in Maryland and the District of Columbia and in the criminal trial and appellate courts in Maryland. I have been in private practice and have been a partner at MarcusBonsib, LLC since 1990. Prior to entering private practice I served for 15 years as both a federal prosecutor in the United States Attorneys Office for the District of Maryland and as an Assistant States Attorney and then as the Deputy States Attorney for Prince George's County, Maryland. I am active in federal and local bar activities and serve on a number of court committee, including the Maryland Pattern Jury Instruction Committee. I have been appointed by the United States District Court on numerous occasions to serve on its United States Magistrate Selection Committee. I am a member the Judicial Conference for the United States Court of Appeals for the Fourth Circuit. For 20 years I have served on the Prince George's County Trial Court Nominating Commission, a Commission that must review and approve all candidates for State Circuit and District Court judicial positions prior to the candidates being considered for appointment by the Governor. In 2011 I was awarded the Robert Heeney Award by the Maryland State Bar Association recognizing a career in criminal law. I have been recognized by the Washingtonian Magazine in its last 5 "Top Lawyers" edition and by Super Lawyers. I am a Fellow in the American College of Trial Lawyers and I am listed in "Best Lawyers in America" in the practice areas of white-collar and non-white collar criminal defense.


Photos and videos

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Practice areas


  1. White Collar Crime: 25%
  2. DUI & DWI: 25%
  3. Violent Crime: 25%
  4. Criminal Defense: 25%


Payment types:

Cash, Check, Credit card

Attorney endorsements

7 total 

Are you an attorney? Endorse this lawyer

  • Victor Manuel Del Pino

    I had the pleasure of having a case against Mr. Bonsib when I was a prosecutor. He is second to none. Level of professionalism and knowledge of the law goes unmatched.


    Victor Del Pino Criminal Defense Attorney
    Relationship: Fellow lawyer in community

  • Richard P Arnold

    I endorse this lawyer.


    Richard Arnold Criminal Defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Robert C. Bonsib Esq.

MarcusBonsib, LLC
6411 Ivy Lane, Suite 116
Greenbelt, MD, 20770-1405


DCActive 199011/29/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Best Lawyers White Collar &Non-White Collar Criminal DefenseBest Lawyers in America2016
Super Lawyer in Criminal DefenseSuper Lawyers Magazine2016
AV Rating for Ethics & Professional CompetenceMartindale-Hubbell2016
Top 100 LawyersThe National Trial Lawyers Association2016
AV RatedMartindale-Hubbell2016
President's AwardPrince George's County Bar Assocation2015
Top Criminal LawyersWashingtonian Magazine2013
Robert Heeney Award for Lifetime Achievement in Criminal LawMaryland State Bar Association2009
Work experience
TitleCompany nameDuration
PartnerMarcusBonsib LLC1990 - 2013
Association namePosition nameDuration
American College of Trial LawyersFellow2002 - Present
Maryland Criminal Pattern Jury Intructions CommitteeMember1992 - Present
Supreme Court of the United States BarMember1992 - Present
United States Courts of Appeals for the District of Columbia BarMember1991 - Present
Maryland Criminal Defense Attorney's AssocationBoard of Directors1990 - Present
Maryland State Bar Association, Criminal Law & Practice SectionPast Chair1990 - Present
Court of Appeals for the District of ColumbiaBar1990 - Present
District of Columbia Bar AssociationMember1990 - Present
Maryland State Bar AssociationMember1990 - Present
National Association of Criminal Defense LawyersMember1990 - Present
Prince George's County Bar Association, Criminal Law SectionPast Chair1988 - Present
United States District Court of MarylandMember1983 - Present
United States Court of Appeals for the Fourth CircuitMember1983 - Present
Prince George's County Bar AssociationMember1982 - Present
American Bar Association, Search Warrant ProjectPast MemberN/A
Fourth Circuit Bar AssociationMemberN/A
Legal cases
Case nameOutcome
State v. D. T.Not guilty on all 5 counts after 3 day trial
United States v. GBMNot guilty - 10 counts
State v. J.L.Not guilty - 3 counts; guilty - 2 counts
See all legal cases 
Publication nameTitleDate
Prince Georges Bar NewsletterAuthentication Cell Phone & Social Media Evidence2015
Prince Georges Bar NewsletterThe Bill of Particulars2015
Prince Georges Bar NewsletterExpert & Lay Testimony2014
Prince Georges Bar NewsletterVoir Dire - Recent Thoughts2014
Prince Georges Bar NewsletterSeverance of Defendants & Counts - A Primer - Part I2014
Prince Georges Bar NewsletterSeverance - Part II - Bruton & Federal Rules2014
Prince Georges Bar NewsletterConstructive Possession - Part I2013
Prince Georges Bar NewsletterConstructive Possession - Part II2013
Prince George's County Bar NewsletterProffer Letter Agreements - Pitfalls2009
Prince George's County Bar NewsletterThe Other White Hat in the Courtroom2006
Prince George's County Bar NewsletterThe Right of Confrontation after "Crawford"2004
Prince George's County Bar NewsletterRepresenting a Client in a Criminal Investigation2002
School nameMajorDegreeGraduated
Catholic University of America, Columbus School of LawLawJD - Juris Doctor1974
Indiana UniversityN/AN/A1971
Speaking engagements
Conference nameTitleDate
Maryland Criminal Defense Attorneys AssociationProffer Agreements - Pitfalls and Practice Pointers2015
Basic Criminal Investigators SchoolRole of A Criminal Defense Attorney2015
MCDAA Fall CLEFee Issues and Illegal Funds2013
Criminal Law Section Seminar4th Amendment Law - Traffic Stops and Street Accostings2013
Training for Maryland Circuit & District Court JudgesHandling the Criminal Trial2011
Prosecutors' Training ProgramEffective Closing Arguments2011
Prosecutor's Training ProgramProffer Agreements2011
Alan Goldstein Criminal Law SeminarPolice Testimony - "Testi-lying" At Motions Hearings2011
FPD Training ProgramEffective Sentencing Arguments2010
Medical Examiner-Pathologists Training ProgramExpert Witness Testimony - Tips2009
J Franklin Bourne CLECriminal Motions Practice2009
FBA Continuing Legal Education ProgramGrand Jury Practice2009
Maryland Judicial InstituteHandling the Criminal Trial2007
CLE for Maryland JudgesIssues in a Criminal Trial2006
Basic Criminal Investigators SchoolRole of the Defense Attorney2002