headshot photo of Elizabeth Costello

Elizabeth Costello

Dale E. Fowler School of Law


Elizabeth Costello is a Senior Deputy District Attorney in Orange County currently assigned to Gang Unit prosecuting the White Supremacist Gangs. In her 19 years with the office, she has completed over 100 jury trials. Professor Costello was assigned to the Sexual Assault Unit for six and a half years where she prosecuted the serious child molestation and rape cases. She received her undergraduate degree from University of California Irvine in Criminal Justice and her JD from Southwestern University School of Law. She has been an adjunct professor at Chapman University since 2009.

“Of all my teaching that I have done over the years both inside and outside of the OC District Attorney’s Office, I find my experiences at Chapman to be the most rewarding because of the caliber of the faculty, administrative staff and students I have had the pleasure of meeting. The faculty and administrative staff are professional, dedicated and enthusiastic. The support and training that is given to the students is exceptional. I have found the students to be prepared, focused and energetic. Chapman truly prepares it’s students for the workplace and produces a well-rounded representative of any business.” - Professor Costello