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Diane Kathleen Whaley

About me


Diane Whaley attended Pacific Lutheran University studying Earth Science, Legal Studies and Economics.  In 1999, Diane graduated from Seattle University School of Law.  After passing the Bar, Diane started her career in criminal defense at the public defense firm - Associated Counsel For The Accused (ACA).  For three years, Diane obtained a wide-variety of experience defending clients against misdemeanor and felony offenses.  Towards the end of her tenure with ACA, Diane established herself as a talented defense attorney against felony allegations.  Diane's reputation followed her into private practice after she opened her law office in 2003.  In addition to her private practice, Diane is appointed to serious class A felony cases by the King County Department of Public Defense.  Until 2009, Diane had a relationship in multiple cities representing conflict cases in Kent, Tukwila, Des Moines and Pierce County (Superior and Juvenile Courts).  Diane served as a Judge Pro Tem in Federal Way Municipal Court until granted an opportunity to supervise Public Defense Criminal Cases in Federal Way Municipal Court for 5 years.   Diane has now moved her practice to Olympia, Washington and now serves Thurston, Lewis, Mason, Grays Harbor, Pierce, and King County.  Appearances are made in Municipal, District, and Superior Courts.  You can find articles about her work on State v. Glenn Proctor under her maiden name Diane Zumwalt. This case gained media attention after Mr. Proctor was released from jail and his case dismissed on the charge of Murder in the Second Degree.  This case was co-counseld with Green River Killer Attorney Mark Prothero.  Diane believes in equal access to justice, practicing with integrity, and zealous representation.  She has a vast depth of knowledge in the criminal defense field after handling thousands of cases over the years.  Diane has handled Class A Felonies including Murder in the First Degree, Murder in the Second Degree, Robbery in the First Degree, Robbery in the Second Degree, Theft in the Third Degree, Assault in the First Degree, Assault in the Second Degree, Assault in the Third Degree, Assault in the Fourth Degree-Domestic Violence, Taking Motor Vehicle Without Permission, Violation of Uniform Controlled Substance Act-Possession, Delivery, etc, Trafficking Stolen Property, Unlawful Possession of a Firearm in the First Degree, Unlawful Possession of a Firearm in the Second Degree, Firearms Enhancement cases, DUI, Reckless Driving, Negligent Driving in the First Degree, Felony and Misdemeanor Violation of a No Contact Order-Domestic Violence, Felony and Misdemeanor Harassment-Domestic Violence, Malicious Mischief in the First Degree, Malicious Mischief in the Second Degree, Malicious Mischief in the Third Degree, Strangulation-Domestic Violence, and Dangerous Weapons Enhancement cases. Extensive knowledge of criminal motions to suppress evidence, alternative reductions, alternative approaches to jail time and rehabilitation, deferred prosecutions, stipulated orders of continuance, deferred sentences, DOSA sentences, and Department of Corrections time calculation.  Diane's felony trial experience in spending months at a time in trial on serious offenses sets her apart.  Refer with confidence.  














Languages spoken: American Sign Language

Practice areas


  1. Criminal Defense: 60%
    16 years
  2. DUI & DWI: 20%
    16 years
  3. Domestic Violence: 10%
    16 years
  4. Juvenile: 10%
    16 years


Payment types:

Cash, Check, Credit card

Attorney endorsements

20 total 

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  • Travis Ashley Newton

    I endorse this lawyer.


    Travis Newton DUI and DWI Attorney
    Relationship: Other

  • Wilberforce O Agyekum

    I endorse this lawyer. Diane is a very knowledgable and caring attorney. She is well respected in the legal community and by far one of the kindest attorneys in our Bar. I wholeheartedly endorse diane for your legal needs!!!


    Wilberforce Agyekum DUI and DWI Attorney
    Relationship: Fellow lawyer in community

Contact info

Whaley Law Firm, PLLC

4570 Avery Lane SE.
Suite. C, Unit. 266
Lacey, WA, 98503


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
National Order of the BarristersN/A1999
First Place and Best BriefNational Environmental Law Competition1998
Academic Achievement Award for outstanding academic performancePacific Lutheran University1996
Talent AwardPacific Lutheran University1996
Academic All American HonorsUnited States Volleyball Association1994
Team Captain and named to First Team All ConferenceTyee High School Varsity Volleyball1992
Varsity Volleyball MVPTyee High School1991
Tennis team Most Inspirational and MVPTyee High School1991
Basketball Coaches AwardTyee High School1990
Work experience
TitleCompany nameDuration
Public DefenderThurston County Office Of Assigned Counsel2014 - Present
AttorneyWhaley Law Firm, PLLC2003 - Present
Contract Public DefenderCity of Lacey2015 - 2015
Public Defense CoordinatorCity of Olympia2015 - 2015
Public Defense SupervisorFederal Way Municipal Court2009 - 2013
Judge Pro TemFederal Way Municipal Court2006 - 2008
Public DefenderKing County Department of Public Defense2003 - 2014
Public DefenderAssociated Counsel for the Accused2000 - 2003
Legal ExternThe Seattle King County Public Defender's Office1999 - 1999
Clinical Law Program ParticipantClinical Law Program, Seattle University School of Law1998 - 1999
Law ClerkAttorney General's Office1998 - 1999
Administrative Law Clinic ParticipantClinical Law Program, Seattle University School of Law1997 - 1997
Legal InternLaw Offices of Kenneth Bromet, Attorney at Law1997 - 1997
Panel MemberKing County Superior Court Conference Committee Diversion Program1995 - 1996
Legal InternDept of Assigned Counsel-Dependency Unit1995 - 1996
Association namePosition nameDuration
Thurston County Bar AssociationAttorney Member2014 - Present
Washington Association of Criminal Defense LawyersAttorney Member2010 - Present
Washington Defender AssociationMember2006 - Present
Washington State Bar AssociationMember1999 - Present
South King County Bar AssociationMember2007 - 2010
Washington Women LawyersMember2006 - 2007
Washington State Trial Lawyers AssociationMember2004 - 2006
King County Bar AssociationMember2003 - 2011
Legal cases
Case nameOutcome
State v. Glenn ProctorMurder Charges Dismissed
See all legal cases 
Publication nameTitleDate
By LEVI PULKKINEN /P-I REPORTERMurder charges dropped in Federal Way slaying2009
By LEVI PULKKINEN /P-I REPORTERCleared of murder, a second life begins2009
Tacoma News Tribune by LEVI PULKKINEN; Seattle Post-IntelligencerCleared, free and ‘just happy to be out’2009
By JACINDA HOWARD Federal Way Mirror ReporterAfter a year in jail, man becomes key witness to Federal Way homicide2009
By LINDA BYRON / KING 5 NewsInvestigators: Federal Way murder suspect released2009
Federal Way NewsCharges dropped against transit shooting suspect2009
By Sharon Pian Chan Seattle Times staff reporterMan "happy to be out" after murder charge dropped2009
School nameMajorDegreeGraduated
Seattle University School of LawLawJD - Juris Doctor1999
Pacific Lutheran UniversityEarth Science and Legal StudiesBA - Bachelor of Arts1996
Speaking engagements
Conference nameTitleDate
Paralegal Intern ClassParalegal Internships2009