Skip to main content

About me

Attended law school at Georgetown University and tried two felony criminal trials as athird year law student.  At law school opening statements, cross examination etc were video taped and critiqued.  Upon obtaining my law degree, I was first admitted to practice law in 1981 in the Commonwealth of Virginia and two years later to the bar for the District of Columbia.  In 1989 I was admitted to practice law in California.  Am admitted to all state courts in California, as well as admitted to practice before the Federal District Court for the Eastern District of Caliironia, Norther District of California, Central District of California, and Souther District of California as well as to the Circuit Courts of Appeal for the Ninth Circuit as well as the D.C. Circuit.  Also admitted to practice before the U.S. Supreme Court.


I have litigated cases in state and federal courrts for over thirty years, having tried cases in Virginai, Florida, Texas, California, Washingto state, Missouri, Georgia, and Hawaii, much of which was while working for the U.S. Department of Justice until 1988.  


I have represented hundreds of criminal defendants on appeal only in Sacramento as well as in Los Angeles, and have represented hundreds of persons at the trial level charged with almost every conceivable crime.  This includes murder,  manslaugher, possession, transportation and sale of controlled substances, arson, spousal abuse, felons in possession of firearms, DUI's, assault, battery, and a host of other crimes.  . 


Photos and videos

348308 1392927294

Practice areas


  1. DUI & DWI: 50%
  2. Criminal Defense: 50%


Payment types:

Cash, Check, Credit card

Attorney endorsements

3 total 

Are you an attorney? Endorse this lawyer

  • No photo

    I am a family law and estate planning attorney. I often have clients that request referrals for criminal law attorneys. I include Bill on my referral list. I have found Bill to be an excellent criminal law attorney with a great deal of experience. The clients I have referred to him have been very pleased with his services. He is able to clearly communicate with clients and obtain favorable outcomes for them.


    Terrance Taforo Trusts Attorney
    Relationship: Fellow lawyer in community

  • No photo

    Bill Duncan is a very experienced and competent criminal defense attorney. Although I am an experienced civil litigation and transactional attorney, I do not practice in the area of criminal defense. I feel confident, however, in referring any inquries I receive in this area to Bill's capable hands.


    John Rollins Business Attorney
    Relationship: Fellow lawyer in community

Contact info

William M. Duncan, A Professional Law Corp.

600 Fourth Street
P O Box 929
Yreka, CA, 96097


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Three year graduate fellowship to get Ph.D.National Science Foundation1975
Work experience
TitleCompany nameDuration
Pro Tem JudgePro Tem Judge2009 - 2011
Partner - OwnerWiliam Ml. Duncan, P.C.1997 - 2014
PartnerMorrison Mahoney, LLP1994 - 1997
Trial AttorneyMeadows Smith Lenker Sterling & Davis1991 - 1994
Trial AttoneyGibbons Lees and Edrington1989 - 1991
Trial AttorneyDepartment Of Justice1985 - 1988
Association namePosition nameDuration
California Public Defenders AssociationMember1999 - Present
Siskiyou County Bar AssociationMember1998 - Present
Legal cases
Case nameOutcome
People v. Davis (2003) 104 Cal.App.4th 1443.Won case reversing conviction
People v. RomanClarification of unsettled law
Fireman's Fund Insurance Co. vs. DSR ATLANTIC et. al.Won case at Ninth Circuit by it reversing and over ruling the Federal District Court for the Northern District of California.
See all legal cases 
Publication nameTitleDate
University of San Francisco Maritime Law JournalThe Oil Pollution Act of 1990's Effect on the Shipowner's Limitation of Liability Act1993
Maritime LawyerLiability of Third Parties for Oil Spill Clean Up Costs Under the Federal Water Pollution Contact Act and Under General Maritime Law1985
School nameMajorDegreeGraduated
Georgetown University Law CenterLawJD - Juris Doctor1981
Oklahoma State UniversityMathematicsMS - Master of Science1968
Truman State UniversityMathematicsBS - Bachelor of Science1967
Speaking engagements
Conference nameTitleDate
Siskiyou County Bar AssociationGeneral Principles of Maritime Law2013