Demetrius Costy

Demetrius Costy

Demetrius Costy was born in the East Bay in 1972. He was raised in Oakland and graduated from Bishop O’Dowd High School. Four years later, he graduated from Loyola Marymount University in Los Angeles.

Recent Successful Case Result

NOT GUILTY Verdict after jury trial for Felony Insurance Fraud: After a two week trial, on a charge of Felony Insurance Fraud, Attorney Demetrius Costy obtained a NOT GUILTY verdict for his client - saving her from a felony conviction, thousands of dollars of restitution and up to 5 years in custody. (April 2018)

In 1999, Demetrius graduated form the University of San Francisco School of Law. He went to law school with the express intent of being a criminal defense attorney. Within months of passing the California Bar Exam, Demetrius flew to Arizona and tried his first case.

Demetrius has handled cases in State and Federal court in 15 different counties as well as Hopi Tribal Court in Arizona. He has tried cases in Alameda, Contra Costa, and San Mateo. He has also argued numerous cases in front of the District Court of Appeal in San Francisco.

Demetrius has represented clients on some of the biggest drug cases in the Bay Area; including a 19 kilo cocaine case, that was dismissed, and many large scale marijuana possession and cultivation cases which have been dismissed or resolved for misdemeanors.

In January of this year, Demetrius won a manslaughter verdict at trial on a first degree murder case in Oakland. He has also handled numerous “high profile” cases which are easily researched online by doing a Google search on,“Demetrius Costy”.

Areas of Practice:

Criminal Defense

Bar Admissions:

California, 1999


University of San Francisco School of Law, San Francisco, California, 1999

Loyola Marymount University, 1994

Bachelors of Arts

Major: Political Science


“I’d like to thank you for your work in getting my plea deal. I know that it wasn’t the greatest stuff to work with but I am so grateful for the outcome....Thank you so much for your incredible skill and compassion” “I am writing to tell you how happy I am with the competent and pleasant manner in which Mr. Costy handled my case. Since this was my first time in such a situation I was very worried and upset. Mr. Costy was equally good at soothing my nerves as he was at making me smell like the proverbial rose at the conclusion of my case.” “Thank you so my for helping us. The case was depressive and a difficult situation for us. The outcome was better than we hoped for.” “Thinking back over the last year, of course you come to mind as someone who helped me over the bumpy road. Thanks for everything.” “Thank you for doing such a great job. We wish you the best in life.” “I know we were a bit of a pain, but, we really love our son. Thanks for all you have done for him. You are a good man.” “I intended to write sooner, but I am just beginning to feel like I’m not on a roller coaster. Thank you for the work on our son’s case. I always felt that you were diligent in your handling of the case. I hope all goes well for you in the future.”


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