David B. Casselman



5567 Reseda Blvd. Suite 330

Tarzana CA 91356

Phone: (818) 609 - 2300



Professional Info


Mr. Casselman is the firm founder.  He specializes in prosecution and defense of complex litigation matters, with a focus on jury trials. He is equally comfortable representing defendants and plaintiffs in major litigation matters.

Mr. Casselman has specialized expertise in public entity liability; inverse condemnation, public construction contract litigation; product liability litigation; landslide litigation, general business litigation, real property litigation; insurance matters and animal welfare causes.


Mr. Casselman was lead trial counsel in two of the top ten largest verdicts in the State of California in 2001. The $94.5 million judgment in the case of Border Business Park v. City of San Diego was the 2nd  largest in the State and the 10th largest in the United States in that year. His $63.9 million dollar judgment on the MTA cross-complaint in the case of a major public works construction contractor against the Metropolitan Transportation Authority was the 9th largest verdict in California the same year. This is believed to be the only time that the same lawyer has tried two of the top ten largest verdicts in California in the same year.


Mr. Casselman was the 2005 President of the Los Angeles Chapter of the prestigious jury trial organization known as the American Board of Trial Advocates (ABOTA), and the 2009 President of statewide Cal-ABOTA organization. He is a well-known jury trial lawyer, speaker, expert, law professor and published author. He has been AV rated by Martindale Hubbell for decades and has been consistently selected as a Southern California "Super Lawyer" since the inception of that distinction.

Mr. Casselman has also served for many years as an active member of the National Board of the American Board of Trial Advocates, authoring and producing the video titled "Civility Matters," a DVD used by ABOTA nationwide to teach civility to law students and lawyers.


Mr. Casselman was also an original Co-author of the 3 Volume "California Practice Guide: Insurance Litigation" published by The Rutter Group. He also served as an Adjunct Professor of Insurance Law at Southwestern Law School and trial advocacy at West Los Angeles School of Law.

Mr. Casselman has also been asked to serve as an impartial mediator in litigation matters, with considerable success in helping the parties reach a resolution.


His speaking experience includes testimony before the California State Senate, as an expert witness, as a speaker at various legal seminars, including Rutter Group seminars, presentations to the California State Bar Convention, as well as various Bar Groups and the California Judges Association.

He is also an active advocate for animals, serving to develop legislation to protect them, and as a pro bono litigator, which included both trial and multiple appeals culminating in oral argument before the California Supreme Court to protect Billy the elephant at the Los Angeles Zoo. 


Mr. Casselman is also the Founding Director of the Cambodia Wildlife Sanctuary, committed to protecting and providing natural habitat for elephants and all other indigenous animals of southeast Asia.

Published Appellate Cases


  • Lang v. Hochman, 77 Cal.App.4th 1225, 2000

  • Re-Open Rambla v. Board of Supervisors, 39 Cal.App.4th 1499, 1995

  • Belair v. Riverside County Flood Control Dist., 47 Cal.3rd 550, 1988

  • Geffen v. County of Los Angeles, 197 Cal.App.3d 188, 1987

Practice Areas



Complex Litigation

Civil Litigation

Government Liability


Breach of Contract

Inverse Condemnation


Bar Admissions




Admissions & Qualifications



Southwestern School of Law

Los Angeles, California, 1978



Honors: Member, Moot Court


Honors: 1993 Alumnus of the Year


Law Review: Southwestern University Law Review, Member


University of Michigan, Ann Arbor, Michigan, 1975



Honors: With Distinction

Major: Psychology 

Major:  Speech and Theatre 


Classes and Seminars Taught



  • Adjunct Professor, Insurance Law, Southwestern Law School


  • Trial Advocacy, West Los Angeles School of Law


  • Frequent Lecturer, Insurance Law, California State Bar Convention


  • Masters in Trial Presentations, American Board of Trial Advocates


  • Seminar, California State Bar Convention

2010 - present

2010 - present

Honors and Awards


  • Southern California Super Lawyer every year it has been available, 2005 – 2016. Selections for "Super Lawyers" are published annually by Super Lawyers Magazine. Only the top 5% of all lawyers in the state are named "Super Lawyers." 


  • Member of the National Board and Los Angeles Board of Directors of the American Board of Trial Advocates since 2002.


  • Mr. Casselman is one of the only lawyers to have secured two of the top ten largest verdicts in the State of California in the same calendar year.


  • President, American Board of Trial Advocates, California State Organization, 2009


  • President Elect, American Board of Trial Advocates, California State Organization, 2008


  • Vice President and Secretary, American Board of Trial Advocates, California State Organization, 2007


  • Recipient, Lee V. Wenzel Civility Award, Los Angeles Chapter, American Board of Trial Advocates, 2006


  • President, American Board of Trial Advocates, Los Angeles Chapter, 2005


  • Alumnus of the Year Southwestern University School of Law, 1993


  • David B. Casselman is a co-author of the 3 Volume Rutter Guide on Insurance Litigation.  He has been a frequent speaker, law school professor and pro bono advocate for animals.


  • Sky Radio recently interviewed him for the American Airlines in-flight radio program entitled "America's Best Lawyers".