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David Demurjian is a Senior Associate in the Labor and Employment Department of Mastagni Holstedt, A.P.C. He is based in the Rancho Cucamonga office, representing public sector employees in criminal defense matters, administrative and disciplinary investigations, critical incident investigations, and use of force investigations.

Over the past thirty years, David Demurjian has been a prosecutor in New York, Massachusetts and California, where he has handled a wide array of felony cases (mostly crimes against police officers). For most of his career, he has been a use of force expert for various law enforcement and military agencies (state and federal) throughout the country. His area of expertise is in use of force by law enforcement and military personnel. He has taught on defensive tactics and use of force throughout the world.

Mr. Demurjian is a graduate of New York University (1984) with a double major in economics and in classics. He received his Juris Doctor at Fordham University School of Law (1987). He is admitted to practice in California, New York and Massachusetts State Bars and also the First, Second, and Ninth Federal Circuits.

Mr. Demurjian is also a certified force instructor for a large law enforcement agency and serves as a sworn member of that agency. His assignments have been patrol, gang enforcement and academy staff for the last fifteen years. These assignments have provided him with a unique insight into the split-second decisions made in the life and death encounters of law enforcement. Mr. Demurjian is also a captain assigned to the Judge Advocate General’s Office.

For the past 45 years, he has trained in Judo, Aiki-jujutsu and Kyokushin-kai karate. He holds a black belt rank in all of these disciplines.

  • New York University (1984)
  • Fordham University School of Law (1987)
  • State Bar of California
  • State Bar of Massachusetts
  • State Bar of New York